Consolidation of systems - need advice

I currently have two systems in my large family room, a theater set up (lexicon DC2, proceed, B&Ws, velodyne, etc.) and a 2channel (jolida el34, silverline sonatas, arcam CD, MM9 TT, etc.). It's starting to look like a stereo shop and the mrs' is not liking it. I am considering consolidating the system to maybe avantgarde duos (or keeping the sonatas) with a 300b (maybe Cary) as my main theater channels, running all sources through the lexicon. This would involve selling both sets of main speakers and the proceed 2 channel amp. As anyone done anything like this? Would the surround sound be too non-uniform with SET fronts and SS/B&W for center/ rears? Would the sound of the 2ch music be acceptable using a lexicon as a preamp? Any advice would be greatly appreciated, as I do not know how to demo this equipment in my area and do nto want to make a mistake after spending the money. Thanks