The first thing that jumped to mind when you mentioned finesse and more power is combining a tubed preamp with a Class-A solid state amp. Not sure if you're looking new or used, but if the latter pairing something like an Allnic L3000 pre with a Plinius SA103 or Clayton S100 amp could be a sublime mix of nuance,warmth, and natural detail with excellent imaging and soundstaging -- and plenty of power. If you'd prefer a tube amp maybe a VAC Phi 200 or ARC Ref 75se or 150 among others.
If you're buying new I'd recommend a Sachs SP14 preamp with the Clayton S100, but not really sure on higher-powered tube amps in this price range. Anyway, best of luck.
If you're buying new I'd recommend a Sachs SP14 preamp with the Clayton S100, but not really sure on higher-powered tube amps in this price range. Anyway, best of luck.