Are monoblocks better than stereo, with tube amps?

Modulation of the power supplies is the issue here. Since almost nobody regulates the power supplies for the output section of their amplifiers, monoblocks will sound better for this reason alone. The result is greater authority, improved soundstage and a blacker background. BTW this has nothing to do with whether it is tube or solid state!

Stereo amplifiers can get around this problem by having separate power transformers and supplies for each channel. Then the only concern is proximity, which can be dealt with if wiring and layout concerns are addressed.

All other things equal, yes.

Not necessarily and in the end it is the sound that counts most. I would not let mono-bloc versus stereo make my decision.

True that!!

thanks for the responses, which have led me to more questions.
Czbbcl, atmasphere, unsound; what do you mean by 'modulation of power supplies', 'proximity', most importantly, what factor involving amplification's sound is more important then the monoblock versus stereo argument? Also, I understand a bit about why speaker wire should be shorter than interconnects, but should interconects literally be quite long (forgive the obtuse questions)