Pepsi challendge revisited - UP DACS

Perpetual Technologies 3 upsampler DAC, Bel Canto DAC 1 upsampler, MSB Link DAC III Half Nelson with Outboard PS and Upsampling option. Comments, preferably from those that have tried at least 2, are wanted. Basically, is the Bel Canto better than the Perp Tech, and are either better than $1000 worth of MSB Link III??? Thanks guys.