Speakers:
Monitor Audio Silver 1 - specs page says they want 40 - 100W. Planning to use near-field for a desktop PC setup, hence the need for a small amp. Not planning to use a subwoofer. Since it's near-field, definitely looking to make sure there's no hiss or noise from the amp.
For "far better choices", I suspect Amirm is thinking of full size units like Yamaha A-S501 ($550)
Parts Express sells lots of mini amps, but I think they are gambles on your no hiss or noise, unless you can find them measured here (or some other independent source).
Consequently, I would stick to companies with a pretty well established reputation. (and even some of them will have hiss if the gain structure is wrong!
The good thing is since you are listening near-field you should be good with the low end of Monitor Audio's 40W-100W range (which I expect is for a normal mid to far-field setup)!
The best bet I can think of is the Emotiva BasX A-100; however it is a whopping 15" deep!:
https://emotiva.com/products/a-100?...EYV6xov5JYQBUc7IQhWTPhd0WRAt8o7IaAiUgEALw_wcB
As I said, the potential for hiss (up close) is there, but it is much more likely with very efficient speakers (like Klipsch).
More importantly, the A-100 has a fan. It may be that it would never kick on for your usage, but that is something to research/ask Emotiva about.
Emotiva gives you 30 days to return for full refund, but you will pay return shipping!
Maybe someone else knows of a good option for you, but unless the Emotiva fits, I'd play it safe and stick with the WXA-50 ... especially if you are not averse to using an app for control. The MusicCast app is mature and I tend to use it instead of the remote! It also gives you bass-mid-treble tone controls.