Cleanest tubes and speakers?

I am looking into my first tube amp, most likely a SCXD or The VCXD. I want clean headroom, as much as pissable. Any suggestions?


And I know I misspelled possible, too good to leave out.

I just had my ProSonic redone. It wasn't as clean as it used to be. Willie put in some SovTek tubes (he said are very similar to Groove Tubes) in the power section..wow...clean as a whistle. Of course Willie did his magic throughout the amp..it's amazing.