Have you thought of upgrading your Pass? I have the Pass Aleph 4 (100 easy watts/ch)and absolutely love it powering my Revel Studios. There are also some Aleph 2 monoblocks occasionally for sale.
ARC 100.2 vs Pass Alephs
Has anyone compared these amps in a high resolution system such as electrostatics? I have a Pass Aleph V and cannot imagine a more transparent and natural amp, but it is somewhat power limited. I listen to all kinds of music through multiple sources. Are there suggestions re: upstream components and cables? Does the 100.2 sound better in a S/E mode or in a true balanced system?