Power Amp Neeed -- PLEASE HELP prevent mistake.

Hello, I am currently searching for a nice amp,, TUBE, SOLID STATE, HYBRID Whatever... I will be running it off a Audio Research LS7 all tube pre and I am not sure of the output impeadance, but want an amp that works very well with it to create a nice synergy. I will go in the used market at about 1,000 USD, Power recomendations from about 40 watts per channel to infinity, Quality and overall sound is all that matters(MUSIC MATTERS). I would like to get the Warmest, tubyest , biggest sound possible and VERY STRONG BASS with the Audio research pre at resonable volume. THERE IS NO TONE CONTROLS IN HIGH-END AUDIO>>> Is there??? So it must produce this sound naturally without Attenuation. THANKS EVERYBODY!!