I have heard good things about the crack but I am not looking for a DIY kit. Thanks for the info.   

good info..keep it coming!!

I'm looking for a headphone amp. Right now all I have are some sennheiser hd380 pros.    I have tried to the rega EAR out and it is a piece of garbage. The volume knob slips around on the metal shaft inside, super bright, REGA loga is half lit up....   Sound path: wireworld starlight...