Any reason why you wouldn't just use your existing audio setup for distributed audio? I like that you want to get a system going throughout your home, but I would suggest that you really think about what exactly you want to achieve in your home. Not just putting speakers everywhere and hoping for the best, but what level of ease of use are you striving for? How much are you looking to spend? How much on equipment? How much on labor/repairs? If you have drywall in place, then wiring will require that to all be repaired and painted, which could easily cost well more than the distributed audio system. Likewise, you will want to consider how much you intend to use this system and how easy you want it to be to use and what it is you want to listen to. All these things seem to come up as questions after the installation, when they can't be addressed, but now is the time you want to address those items.