Just got the Yamaha 750 so I'm keen to go 6.1. Couch is right up against back wall. I want a rear that is very wife friendly re. instalation...so thaught 'flat'! Do they exist? What would go with my KEF set: I think they are called Q55's for front ,Q Centre & Q15's (shelf standing full bandwidth) as current rears, but are against back wall facing into room. Rel strata sub. fl c r rl me rr ---------------------wall Also, how would a Kef egg (unsure which one) would work if no flat speaker exists? Thanks.