Integrated Amp Advice - Rogue Sphinx or Peachtree nova150?

I owned a Peachtree Nova, I think it was @ 80wpc. Very solid amp punching well outside its weight. It’s been a few years but I recall it was slightly “rough around the edges” to my ears. My main amp was a Primaluna tube integrated though.

Recently purchased a pair pair of Harbeth C7ES3 which I would not classify as terribly efficient and drank the Harbeth kool-aid of higher power, higher power and sold my tubes and went with the Rogue Sphinx. It was a really good decision, in my case. The tube amp was running out of gas at higher listening levels.

I immediately replaced the JJ 12AU7’s with a Gold Lions which I loved in my tube integrated.  If you can listen to both you’ll be miles ahead in your decision making process.  

Hope this helped.  

" How is the DAC and phono stage in the nova? "

I'd say respectable / good sounding. Quiet without any background noise, Preamp has exceptional S/N ratio.
Overall a solid unit. 
It will drive the 4 ohm load / low sensitivity very nicely.  

I have the Peachtree Nova 220 SE and only paid $800 for it .