For less than $1k an ARC D70MkII is a wonderful amp (or possibly a D76A); for 1.5x dollars more you can get a few more watts with the D115MkII. Up from there is a VT200 (original, not MkII) - it is a seriously great sounding amp with lots of authority (under $4k used in good condition). Up a few dollars from there (but I don't know if it sounds better) are VTL MB-450 monoblocks, and then VTL MB-750 mono blocks if you need a small ton of power. The challenges become not only the acquisition cost, but sufficient AC power, heat, amplifier weight, and the work/cost involved in shipping/maintenance; but all these amps should be highly competitive sonic performers at their price points.
Best Tube Amp under 10K?
Having every audio dealer in town recommend their line as "the best unless you want to spend $25K" and buy a ..." is frustrating. Well, like most of us, I can't spend $25K on amps ... but I am curious to know what others consider their "final" amp upgrade under $10K. My listening tastes are wide ranging but will mostly include SACD jazz and classical. I do not have a turntable ... yet. And I ususally play at low to moderate volumes only (the wife factor)-- speakers are reasonably efficient 91DB KEF Ref 4's that I hope to upgrade.