The Peavey would be a good idea. Since this will be used for a studio, durability and maintenance should be factored in. Solid states sounds like a good idea, one that is very pedal friendly.

The Vox has great tone, but if say the tube wears off, its quite a pain to replace. Access to the poweramp section is like going through a maze.
But, I believe the Vox would have the best tone out of those few?

Objective post ends here, +1 on the Vox. Not sure how much abuse it can take though, so if durability is the top priority I think solid states is where you wanna be looking.