I'm in the process of putting together a HT in my house. The space is somewhat small. I will have a mounted plasma tv and a sofa about 11 ft from it against the back wall. The dilema that I have is that I will need to put my rear speaker right by the back couch. I will be using in wall speakers So, where do I put them? In ceiling? in the back wall? For either suggestion, where far do you put them from the 'sweet spot/couch?' I'm thinking of Infinity ERSHV 250s for the center and fronts. No sense of what I'll do w/the rear.. suggestions? I have not purchased my reciever yet...but my budget is low around $600 for that.. so I'm thinking Yamaha as a brand that I'm familiar with. Thanks for your help!