Single ended Power amp recommendation

I also have and love the SAP J2000 twins. I have used the Cary 300SEI, Cary 805s, Tenor 75i,custom made 45 push pull amps, and currently a custom 2A3 SET monoblocks with the Audio note Kageki tansformers. Like Larry has stated and IME, the speakers do very well with most tube amps. I suggest that you stick to your budget, buy used, and try to get an amp that you could resell without difficulty when you are ready to make a change.

In answer to your question, as expected the amp I prefer the most is the one I am using now, a custom made 2A3 SET with the Audio note Kageki transformers and silver wiring. However they were pricey and I had much enjoyment with J2001 and other less costly amps. I particularly enjoyed using a 45 SET; there are several makers of these amps-Wavelength, Korneff, etc.

Good luck,

Reg