Single ended Power amp recommendation

Well, here is no advice for a tube design, but did you ever listen to a Pass aleph series ?
They are something special and sound very good from scratch, and they are not sensitive to Preamps.
Another interesting idea could be the F1 amplifier ( the First Watt ), these are made for speaker design like you have.

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.

Rgwrjs,
from all the amps you've tried, which one you prefer the most?
The SAP J2001 MKII has 97db instead of the older version, which have 99db.

Thanks

Also, another question I hope someone can help me with. How would you compare the 845 v.s. the 300B.
I've expirience the 300B (Cary 805C) and loved it. Heard a lot about 845 so just wonder....

Thanks

30 watts is more than enough power for any kind of material for most speakers with a 99db efficiency rating....10 watts would be plenty