Advice for integrated for Kef 105/3 reference speakers my friend inherited


Hi, a friend of mine has scored some Kef 105/3 reference speakers. They are 4 ohm, they say type sp3111 and up to 300W amp. 

He needs an integrated unit, this guy is not some millionaire audiophile, but wants a quality 2 channel integrated. Something used around 1k, no more than 1500 (USD) is probably a good budget. Anybody have recommendations?

Tubes, and class A in general is probably not in the discussion. 
jmcdonagh
There is a barely used Rogue Audio Sphinx listed here on Audiogon for $900. 100 wpc@8ohms and 200 wpc@4ohms integrated amp with a tube line stage plus a phono stage. Built in the USA!
I had some similar kefs and what worked for me was a musical Fidelity a308. It’s vintage. At the time, it was their top-of-the-line. I’m guessing if you could find one it would be in the right price range.