Paul, have you considered Glockenklang power amplifiers? You already have a couple of their speaker cabinets, correct? If their power amps are anything like the rest of their gear, you probably won't be disappointed. I think you mentioned in another post that Glockenklang prices are more reasonable over there. Unfortunately, the gear is pretty expensive in the US.
By the way, I use a QSC Powerlight 1.4, which works well for me into my Glockenklang Quattro or Bergantino HT112 cabs.
Carlos, the Peavey amp you mentioned was tested in Bass Player magazine, though I don't remember which issue. The review was favorable, as I recall. Just in case, keep in mind that it requires a deep rack.
- nate