100W, 200W, or 300W?

You need to decide what type of sound you're after. You chose a highly resolving speaker and I assume you want an accurate representation without being overly romantic (highs rolled off). Luxman will give you that. Mac will also sound beautiful and will make anything sound pleasing to your ear. B&W with a diamond tweeter will need to be restrained and either Mac and Luxman will do. However, Mac will do it to a much higher degree. 

Also, I recommend you stay away from lesser known, smaller and obscure amp manufacturers. It is true, the more obscure highly specialized amps could give you something special, but at the same time they're harder to maintain and may become unfixable if the dealer loses support or if manufacturer goes out of business. That is one reason Mac retains its value throughout time. They are extremely reliable, and easily serviced. Luxman has a similar reputation. 

Where are you located? What brands do the dealers carry near you? By the way, you can always negotiate the price on a new amp. I usually get at least 15% off. You can do much much better on used equipment. 

One can always take the stance that ’too much is Never enough....'

A pair of Crown PA amps, capable of running a kilowatt a side...

Into a floor to ceiling line arrays, anchored into both....

’Dropping the needle’ might break the windows, but Hey...

Nothing exceeds like excess...;)

Something to note. A huge amount of speakers are 88 Db. Krell or some other amplifier manufacturers make the wattage ratings on some amps seem overstated -or are Krell et al understated I cant remember. The power supply is an important feature to consider when driving difficult loads. I’m with Erik Squires 1 step at a time. Try getting your maximum benefits with what you have now by using room treatment speaker position in relation to walls and your hot seat. Let your Ears be the judge. Calculations only take you some of the way. As for the Blue meters its an aesthetic choice which may be at odds with the sound you are after.

May I follow up on @almarg advice above and suggest you hold on to your new speakers which are excellent.
Amp: consider an ATC S(?) 150 integrated. It retails far below the Macs and, all things considered, it sounded excellent driving the model up from your speakers (804).
The driving power and clarity and subjective feeling of control were top-notch.
ATC is known for their speakers -- and I love their top 2-way and their 3-way models, but I was hardly expecting them to turn out so capable electronics... a totally unfounded bias as it turned out!

My room is a little smaller than yours: about 15x15x10 high. Sub is eventually on the TODO list to fill in the bottom end - but after amp and streamer upgrades.

@eisenb11 If your room really is these dimensions then I don’t think you’re going to need all that much power since your room isn’t that big. If you are not overloading your old harmon kardon then this is all the proof of that you need. But you do have a different problem- your room is square!

It is very difficult to get the bass to work properly in a square room! The most elegant solution is to employ a Distributed Bass Array and to correct minor problems, add room treatment. Standing waves are a huge problem in a square room, and room treatment won’t fix it on its own. You’ll need to break up the standing waves (otherwise you’ll have one-note bass with the rest of the bass almost non-existant).


If this were my system I would be looking at this issue first, rather than looking at increasing amplifier power! You need that amplifier power to make bass notes without distortion, but if they are being canceled out by standing waves in your room, no amount of power will fix that- because the more energy you put into the bass is irrelevant if it simply cancels itself.

The best distributed bass array system I’ve seen is known as the Swarm and is made by Audiokinesis in Texas. Essentially it is 4 subs, each about a 1 foot square by 2 feet high. You place them directly against the walls. Two are in front, and the other two are asymmetrically placed elsewhere in the room, maybe one to one side and one in the rear; by doing this standing waves are broken up and you get even bass distribution in the room down to 20Hz. They do not operate above 80Hz so you can feed them a mono bass signal (so they can all be fed from the same bass amp) and as long as they do not go above 80Hz then the main speakers will convince you that bass drums and bass guitar is in front of you since their harmonics will be coming from the main speakers.

I am very unconvinced that you need more power. In particular, if you took the bass notes out of the main speakers (some subwoofer crossovers do that) then you’ll find your amp has plenty of power.