Beginner choosing amp help

Some good thoughts above. You will need to decide if the ML Motion
is a long term keeper or a likely future item for upgrade. Best advice
is to read, listen and learn. Your preferences may change the further 
you get into it. Good luck!

Having auditioned both Luxman and Hegel integrated amps recently, Imy opinion is that both would provide noticeably better sound. Your speakers are 4 ohm and the manufacturer recommends amps with 20-300 watts power. That’s an overly wide range and I would recommend erring on the side of having more power, especially given the 4 ohm impedance of your speakers. Hegel amps are real powerhouses, and the H190 at 250 watts at 4 ohms would be a good fit. While at $4,000 it is a bit over your budget, it has the advantage of having a nice DAC as part of the package and it has an Ethernet port. My dealer indicated that certain Hegel products should be designated Roon ready in a matter of months. Purchasers of units before that upgrade will be able to download a firmware update to make theirs Roon ready.

Audition one at home (and some of the others recommended) and listen on your speakers in your room. That’s been my rule for many years and it has served me well. Dealer showrooms are often treated with acoustical panels and can sound dead compared to a listening room in a typical house. 

OP: Just FYI, the Luxman 505 is on sale because vII is out. I would call the dealer to see how many are left or that choice will beade for you.

I scored the last 507ux in the US. 😀

You may benefit from taking your time, as someone suggested, and research your options.

For instance:

Do you want to display a rack of gear, or have a slick, minimal setup?

Would you consider buying used? If so, you can stretch your dollar considerably. 

Are you a fiddler/tweaker, or a buy it and use it type? If you think you will want to upgrade this or that, you might not want an all in one solution.  

There are are other considerations, of course...

There are knowlegeable folks in here when you narrow it down down a bit. I hope you enjoy the process!

Best,
Gary

Here is my advice (for what it's worth...)
Don't jump into a Rolls to commute to work when all you've ever driven is a Malibu. Go through the Buick/Cadillac/BMW lanes first. You'll understand and appreciate the Rolls much more then. 

If your main library is Tidal (I love Tidal....) then go the separate routes. Get a DAC with MQA unfolding/rendering and at least some DSD over PCM ability. I just auditioned the NAD C658 and loved its streaming, integration and sound (mostly, but it only goes to 192).

It has inputs for digital and analog (Phono!!) and also some tone plus two sub outs. I would pass this off to whatever amp is recommended for your speakers (I am using a rebuilt Pioneer SA-9100 to KEF LS50. My SVS Ultra Towers were too big for our new listening room)

Project also makes the incredible(y) inexpensive Pre Box S2 Digital (another favorite of mine) for about 1/3 the price of the NAD but also way less flexibility.

Anyhow, either of these or maybe a MyTek Brooklyn out to a nice 50-100 watt type A or A/B amp (I don't think tubes or type D would be great at this price. Maybe a used Peachtree Nova or even back to a classic Pioneer/Marantz/Sansui receiver). If new might consider a Schitt or Emotiva separate (one amp per speaker). You could actually get the NAD preamp and two Schitt Vidars for about 3K. Not bad!! You could even start with one Vidar ($700) run in stereo and add another later to go mono block!!

Wow...so may choices these days!!