Since the Wife-That-May Be (WTMB) has limited you to control of the "Subterranean Realm" (basement), I would look for (or better - build) a house that has a large enough basement to allow both a theater AND a seperate 2-channel room. ...Just my advice after travelling down the same path. :-) I certainly wish I had a 2-channel room to put the Whisper XDs in right now, with their own amps, preamp, and a high-end DAC. I could easily run a line from the media server in the theater room to feed the 2-channel DAC. And, I could optimize the acoustics of each room for the best results.
Heck, I should start thinking about an addition to my own house... :-)