I'm looking for thoughts on amps for my new ESL 15's. Currently I'm running Parasound JC-1's with my soon to be outgoing Summits (before that, original Aragon's), and have been more than happy with both of them. In fact, I kind of thought these would be my last main amps. However, once I started watching a couple of ML forums, and looking at different members systems... I'm wondering if maybe I have been missing something. Should I be considering an amp upgrade? If so, what should I be looking at? I don't think I will consider tubes as I think there is likely more maintenance than I might be interested in (although tube fans please chime in)...