Please tutor me on some integrated amp basics.

Ignore all specific recommendations. They aren't worth the bits to transmit them, little more than fan boy ravings.

NEVER forget you are building a system. You could assemble the 'best' of everything and still have the sonic equivalent of the Texas Chainsaw Massacre.

Well designed integrateds offer the advantage of internal connections without all the sonic garbage introduced by cables and connectors.

99% do not understand the power relationship. All other things being equal, which they NEVER are, 400w only plays 6db louder than 100w. 400 sh.tty watts are far worse than 40 great ones. Damping factor is irrelevant.

Impedance [Z] is largely misunderstood and misreported. Mathematically Z is the product of LCR https://en.wikipedia.org/wiki/Electrical_impedance As used by speaker manufacturers, it has little grounding in reality. Ideally it should be quoted as a range, Min Z @ Hz, Max Z @ Hz. What most manufacturers report is meaningless. They may approximate the average, something close to the minimum but almost never the frequency. To be useful, you would also need to know an amplifier's capability to supply current at the specified Hz and Z and every other combination within the frequency band. Most power specs are on a resistor. Some are on a simulated speaker load. NONE are on an actual speaker playing wide range program material.

Ravings about Class are audio prejudice. As my dear old Great Gran was wont to say "There's good and bad where ever you go. And Bad and Worse in Ireland." Class D maybe exactly what you need to breathe life into the A3s without taking out a mortgage.

Bonne chance...

P.S. - the 8005 is a well designed, excellent sounding unit. Marantz paid a great deal of attention to power supply linearity and topology, something that can pay huge dividends.

For anyone interested in power supply Z linearity and how it affects the music, there is a very interesting thread on diyAudio https://www.diyaudio.com/forums/power-supplies/143539-look-lm317-lm337-regulators.html

It's all about bang for the buck, as assetmgr said.

I suggest that you include a record cleaner in your budget. Perhaps the best bang for buck. I went to ultrasonic.

Least bang for buck, IMO, is cables. I went to the trouble of building theoretically optimal interconnect cables (virtually zero capacitance, virtually zero dielectric absorption, gold plated fine silver) inside a Faraday cage cabinet (for noise rejection), and found them no better than star quad microphone cable (Canare, Mogami) with decent termination (ETI, Klee).

When you open up a high priced component, you'll see why - they use internal wiring which is no better than microphone cable in terms of noise rejection and dielectric absorption, and very little better in terms of capacitance, three key physical properties. I suggest that you buy cheap, real cheap, and upgrade only when some one can demonstrate a better sound in your system.

Let the hate mail begin.

@skyscrapper  send me a direct message if you want to walk with me on the A3. I am buying this myself and have figured out what the best power options 1, 2, 3, 4 etc are for them (my opinion). Some of these posts can get you confused.

Yysantabarbara, you're absolutely correct about the power requirement. I'm on it.

Onhwy6i, yes, that's easily done.

Inna, so you think I should stay with A/B's. OK, I'll look into them.  I rarely except on occasion blast my music any more. Low to moderate listening levels prevail. Many years of complaints about volume modified my behavior in this regard. I'll look into listening to the Luxman's you suggest side by side with an integral phono stage compared to the Hegels with an outboard one, if at all possible. Thanks

Audioman, unfortunately I can only afford to lust over the Hegel H590's. As it is the H360 at $6000 exceeds my budget by $1000 but I'm willing to go with Alon Wolf's recommendation in order to ensure my Magico's are well matched to their amp.

Rbstehno, You're right, 30-60 watts won't get it for sure with the Magico's. Thanks for sharing your DAC experience. I'll be trying inna's suggested higher powered Luxman A/B models.

2psyop. appreciate your explanations on ohms and power requirements, including what speaker sensitivity entails. Researching on the internet can be confusing. For instance I read the the Magico A3 was a 4 ohm speaker and the next article described it as an 8 ohm type. This is confusing to someone who has just enough knowledge to be dangerous. 

Builder3, thanks for the clarification on specs on the Luxman L-590AX.

Assetmgrsc, I should get subscriptions to Stereophile and Absolute Sound. I have a card for a discounted Stereo Review subcription laying around here somewhere. I used to subscribe to Stereo Review, Hi-Fidelity and Audio years back and always enjoyed them in spite of much of the technical talk going over my head. Those subscriptions were in the pre-internet era. Now you can seek out explanations of the technical terms on line, like I'm doing here right now. 

I only threw out piles of those three old mags last year. It would be fun to start new piles. Glad you mentioned it. Thanks for your other advice too.

Ieales, I was thinking, like you, that replacing my current separates with an integrated amp would eliminate some unnecessary and unnecessarily expensive cabling. Possibly having to add an external phono stage will return me to square one however. Nothing good ever comes easy.

Your'e Great Grandma's saying about the Irish is a scream.  Being an O'Neill I should know, and am still laughing. Good one.

Your explanation about impedance fried a couple of my internal circuit breakers. You are obviously well versed in these subjects. I am barely self taught.

Good advice on building a system. That's why I'm willing to dole out the extra cash on Alon Wolf's say so, since since my Magico A3's are his speakers and he should know what matches them well. I don't presume to.

Thank you for the good word on my Marantz 8005 CD player. I did do a fair amount of research on that one before purchase.  I'll check your link on power supply Z linearity too, although it's likely to cause further brain circuitry overload and damage, which I can ill afford. Take it easy now. Maybe I'll watch the Texas Chainsaw Massacre on Netflix later.

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Terry9. I've a lot to learn about cabling. My old system is wired with zip (lamp) cord as most of us did in days of yore. It galls me what they can charge for a wire. I really have to stop whining.

Do you like your Ultrasonic?  I've done a little reading on record cleaners such as the VPI models and others. A record cleaner is in the queue for acquisition after a phono stage and cables. Fortunately, I still have my old Zerostat anti-static gun to use along with a record cleaning machine, I'll be breaking it out again after thirty years of disuse, sitting in a drawer. I've even considering  getting my old Burwen TNE 7000 Transient Noise (pop & click) Eliminator up and running again. No stopping me now.

After buying $10,000 speakers, now you're recommending I go cheap? You're inspiring me to throw bricks in your direction like Krazy Kat used to do. Take care now Terry. 

Mike