Thanks to all for the input. I've seen nothing but raves about the Bryston, and am not averse to going that direction. It's just with the high cost of Hi Rez downloads, I'm simply not certain how far I will go with this.
Given this statement, I certainly would not invest at the Bryston level until you're sure. The Touch is a great, inexpensive, way to get your feet wet here and, even if you get the Bryston (or other device) later, you can always use the Touch in another room of your home, etc.