There is a 93 page thread over at ASR. You can also email the owner. He is very responsive. I put down a deposit for a 6 channel Hypex model for upgrading my home theater.
Here is a thread dedicated to the Purifi Amps:
Buckeye amps
Does anyone have any knowledge, preferably first hand, of the Buckeye 2 channel Purifi amp or the quality of Buckeye amps generally?