I have an SVT-CL. While I'm in love with the tube warmth, punch, and just the entire sound, I'd like to add a little more "grit" to it. Something pretty subtle, and something that doesn't sacrifice the already great tone of the SVT. How well would something like a Tech 21 VT Bass pedal or Sansamp (in whichever form) work in conjunction with a tube amp, being as they're normally used to emulate tube characteristics? I really like the clips I've heard of the VT. But would they enhance the tube tone, "hurt" the tone, or would it not make a big difference? Thanks.