I have been on a search for an Ampeg based rig, both an amp and cab, for a month or so. Thanks to all for the advice on the various options. I wanted to ask another question of all of you experienced Ampeg players. First, I am not looking at a classic SVT (300w all tube amp) into an 810 cab. Just too much to haul for me. That said, what is your opinion on an SVP pro (SVT preamp) into a beefy power amp vs. an SVT Pro amp like either the 4pro or 6pro. For a cab, I am looking at the used market for a Berg NV610, as well as possibly having Don at LDS build me a sealed 610 loaded with Eminence Beta 10's, or Faital 10's.