Is a VTL ST-150 enough?

I have been shopping for a new amp for my verity Parsifal Encores. I am trying to avoid mono blocs due to room constraints. I demo'd a VTL ST-150 and in tetrode it was fine. In triode it was magical, though the bottom end at times was a little loose and not fully defined. Soundstage was freaky holographic and at times I was actually laughing hearing such a thing out of my system it sounded so cool. I am concerned though that it may not have enough power for all my needs, wish VTL would make a ST-250. Others experience? Suggestions? My system is posted though with upgrade to veriy parsifal encore, Nordost Frey speaker wires and Naim CDX2. Thanks.