Get a usedl MLevinson 331 or 332. I have tried the 331 driving large Nautilus to incredibel levels. The key thing is the amplifiers' current capability, don't trust manufacurers' power ratings.
The Pass 2 is a great amp, but I think it seems a little less powerful than the average 100 watt amp. I have some 150 watt tube amps that are much more powerful than the 100 watt monos, other than that the Pass amps are awesome in the 2-3k range. If you like tubes, you will probably like the Aleph 2s.