Amp for LS50

I am using the Peachtree Nova 150 at the moment. It is very good and fatigue free. I could get better amplification but I do not think it is warranted with the LS50. I will be buying a new set of speaker soon, KEF Reference 1 or Magico A3 and for that better amplification makes more sense to me.

I am also going to upgrade my Nova 150 to the Nova 500 in Spring 2019. The Nova 500 has a different preamp section than the 150 and 300. I will likely drive the LS50 with the Nova 500. Overkill for sure but the price of entry is rather low.

@b_limo It sounds like your brother's Peachtree is not the new stuff made in Canada. They basically restarted the company with N. American manufacturing and new designer. They ditched the tubes for lower noise floor.

The NOVA line and LS50 are a very good match. I had a Benchmark DAC3 + AHB2 hooked up to the LS50 and it was a bit better than the NOVA 150 but it also cost more than 2x the price of the NOVA 150. I sold the Benchmarks and kept the NOVA and LS50. 

Peachtree give you a 30 day trial so, if you are inclined, do a little bit more research on this combo. You really don't have much to lose. The new NOVA 500 has a new DAC and newer preamp section.

https://darko.audio/2017/01/dancing-with-the-big-boys-the-powerfully-persuasive-peachtree-nova300/

Here is my next Peachtree upgrade.
https://www.peachtreeaudio.com/nova500-amplifier-with-dac.html

I have used the following with LS50

Bryston 4B-SST (300W Class AB)
Bryston 7B-SST (600W Class AB)
Benchmark AHB2 (100 W NOT class D)
Parasound A23 (125 W Class A/AB)
Peachtree Nova 150 (150 W Class D)

All above are at 8 Ohms.

The best was Benchmark AHB2. It was clear and fatigue free. Just a brilliant amp and one I may buy again. The second favorite was the Peachtree Nova 150 which was a nice combination of the Parasound and Bryston. You can listen to the Peachtree 8+ hours a day like I do at my home office. I am very sensitive to harshness and get fatigued easily. With the Peachtrree none of that ever happens.

Like I mentioned above the plan is to upgrade to the NOVA 500 if I do not get another AHB2.

The OP would be well served by trying the FREE trial of the NOVA line for 30 days. Everything he asks for is covered in one box.

Another line that I can recommend with the LS50 is the Hegel integrateds. I heard the H360 and Roost with KEF Blades and it was very good (not very loud volume level). They will also work well with the much easier to drive LS50. The Roost and H360 are not far off the price the OP wanted to pay.

BTW - Darko is now using the Hegel H590 to drive his LS50s.
https://darko.audio/2018/10/a-short-film-about-the-hegel-h590/