Thanks again for the comments.

I'm sorry, but I still don't understand why I need a preamp if I am only planning to have a single signal source that has it's own volume control. Since I don't need a preamp (I think), I thought I would get more bang for my buck with a power amp as opposed to an identically-priced integrated amp.

By the way, would the 60W Adcom GFA-535 provide sufficient power for my purposes? Would more power be overkill or actually provide better sound (all else being equal) at low volumes?