I'd investigate the Onix SP3....very good, can pick up used for around $500.00. Check 6Moons for review.
Well, my system now is comprised of an Adcom GFP-750 preamp, and PSB Alpha speakers, but I will be replacing the PSB with Revel M12s in the near future.
As for amps that I've heard, I really havent heard that many, but I have liked the sound of the Krells and Levinsons. I've listeded to a Rotel integrated and wasnt too impressed with that. I also had a Marantz 2330 that was okay, but not outstanding. I seem to like systems that bring out a wide soundstage, and detailed vocals, especially female. Does that help at all?
A rebuilt with Curcio power supply mod-Dynaco ST-70 with very good tubes might be the ticket and surprise you too.
I replaced my Threshold S/300 with the Dynaco which is more musical and doesnt have the Threshold midrange dryness.
The Dynaco doesnt have the power of the Threshold or the bass control,but believe it or not, the Dynaco is not that far behind (with Curcio ps mod and vg NOS tubes) which adds a much improved midrange tubes are known for.
A few for sale here within your budget.
Thanks Autre, that helps a lot.
I have owned both Adcom and Rotel(RC-990/RB-980BX) pre/power combos. As great a value as both are, they can be hard, edgey, and dry as all getout. Moving to tubes will be a revelation. I'd suggest selling your Adcom preamp and use the extra dollars to get a better tube integrated, it will proably degrade overall performance.
The Revels at 87dB would probably benefit from 20-40 wpc of push-pull amplification, depending on your musical tastes and volume levels.
Buy used to maximize your purchasing power and look for Jolida(Jolida JD-302B), Antique Sound Labs (AQ-1003 DT, AQ 1001 DT), and Consonance Opera( M99 Plus, M100 plus) integrated amps.
All three of those manufacturers have a good history and reputation for low-priced tube gear.