Tough question. Tube amps are different enough that you really have to buy according to your tastes. Some of my favorites are: vt100m2 (which I own)(transparent, full sounding and very natural), BAT 150SE's (even more transparent with amazing precision (I guess the 75s would hit the 10K mark)), and Conrad-Johnson mv-55 (the midrange window is to die for). All very different in presentation.
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.