7.1 system suggestions for a two channel guy

I'm building a new home and am looking to go from a two channel system to a seven channel system. I went to my "audio guy's" showroom to hear what he had to offer. The sytems and speakers he showed me were loud and muddy. I tend to like more of an analog two channel sound but I want to try the seven channel in my new home for surround sound but don't want to sacrice quality for quantity.

My question is does anyone have ideas as to a unit/system that will provide a clear seven channel sound which meets modern demands at an affordable price. I going for "bang for my buck." Also I'm going from two channel towers to 7 channel in-walls so some suggestions on in-wall fronts would be nice also. Jamo?