Ken, by SVT imitation, do you mean it sounds like an SVT turned up into the red at low volumes, or do you mean that it cops the clean SVT sounds as well? Because that's the big selling point of the VT...that it does both clean and dirty and sounds like an SVT or B-15 no matter which way you go. And since you're on record as saying it doesn't matter whether you use tubes or SS if all you want is clean tones (it does, but that's beside the point), I thought I'd better clarify.The TC RH450 is the bomb if you dig a classic Ampeg type tone. It is one of the loudest small heads I've ever heard (don't let the 450 rating fool you). Also, the 'Classic' would probably sound great if emulating an Ampeg was your main goal, and it is a few hundred less than the fully featured RH450
It's almost like they have one of those VT pedals built in, and the additional features of the 'top of the line' RH450 are great (tuner, compressor, tube emulation, and four full bands of EQ). The 'Classic' has fixed EQ, compressor (GREAT compressor) and tube emulation, but does not have the tuner,memory presets, or semi-parametric EQ of the RH450.
These heads do a pretty good 'SVT' imitation, but also can get clean and modern if you want it. They like 4ohms (given they are solid state amps) to get the full wump out there.
Not that I'd ever buy one since I consider the folks who run TC a bunch of JO's, but I would like to know for curiosity's sake.