The MCACC rules, period -- and you have to listen to it in your room to really appreciate the effect.

And yes, I occasionally use the USB input on my 45TX, feeding the internet radio and other sources from my WiFi-equipped laptop. It works flawlessly -- my PowerBook immediately recognized the receiver as a USB audio device without any additional software. The connection is unidirectional (computer-to-receiver only) and 2-channel only, but of course, DPL II etc. works just fine with the USB source, too.