@vinyljones1 I have the same space as you and had the Peachtree NOVA 150 in that space. The NOVA 150 and NOVA 300 are identical in the parts that I think are not very good, the preamp and DAC sections. So I would avoid it in 2022, t was not bad in the day. Saying all of that I did buy the new Peachtree GAN1 amp today. Though this is not what you need since it only has 1 input.
I have the Benchmark AHB2 monos and the LA4 preamp in my office now and it is not overkill at all. It is perfect in every way, I use a Musetec 005 DAC to add a bit of flavor to the sound. I love this setup and can easily recommend it. I may sell my 2nd extra Musetec 005 if the GAN1 is as good as they are hyping.
A one and done solution is a KRELL K-300i integrated amp. I sold mine for about $5.5K and all you would need is an Ethernet cable. It sounds incredible and it has only gone up in price since I got it. It also is an excellent power source for the RAAL SR1a earphones via a 2-channel adapter box.
At one time I had a Benchmark HPA4 preamp as my 2-channel preamp/headphone amp + AHB2 amps. I used the HPA4 with Meze Empy headphones (the old warmer model). However, I discovered RAAL headphones and out went the Meze and even the HPA4. I sold that for a profit and bought the LA4. The Meze Empy and HPA4 were very good.
Send me a DM if you want a deeper dive into the world of RAAL headphones.