Stuben,
Absolutely interested. I'd like to hear the amps you are building. What kind of speakers do you use with those?
Currently I have a nice 2A3 tube amp built by a custom builder here in Cincinnati, a pair of Bottlehead 2A3 mono-blocks that I assembled, a Red Wine Audio Reali-T, which is a tri-path based class D amp, passive pre-amp and Scott Nixon DacKit all built into one tiny chassis. The Reali-T is battery powered too. It's really spooky good considering the cost.
I've got a couple of single driver speakers that I'm using at the moment. One is a DIY HempAcoustics unit reviewed here(I bought the review pair):
http://hempacoustics.com/Review.pdf
And the other is a Lowther DX3 in the Commonsense Audio/Lowther USA 2.5 mkI dual port cabinet.
We just had a small get together with several of participants from this thread. Maybe we can do it again soon.
Enjoy,
TIC
(Tom In Cincinnati)