Sonic Impact sells the little planar system for 40$ that sounds great. My neighbor has one pair and we tried the T-Amp on them and it is worlds ahead of the stock Altecs he was using. For building why not try Brian Bells DIY Jordan build. It is a very small SD speaker that would work as a computor monitor. He uses it with the GC and loves it. The T-amp should work just as well as the GC; I use both myself and they are comparable. His site is BrianGT or look up Gainclones and he will be there. He does a photo essay on the build that is very thorough.