I have, and the Bel Canto is horrendously overpriced. I did some digging on icepower amps, and using the jedi mind trick was able to get the wholesale price from the manufacturer on the power supplys and units themselves to see what they cost. If 400 bucks in parts is a good deal at 4 grand, well then you may be impressed. Now, that said, I like the sound of them. Very detailed, open clear, etc. There are a number of manufacturers using the icepower modules, and the prices vary drastically. I don't remember off the top of my head who the cheapest one is, but you can search the asylum and figure it out quite easily.
D~