Hi, Just bought KEF Q5 fronts and KEF Q9C. Got the KEFs second handed, and now I want to buy rears and a receiver. The thing is that I'm on a tight budget and as alternatives for receiver I'm thinking of: Yamaha RXV630 or Pioneer VSXD-711 Will either of them "ruin" the sound of the speakers. Furthermore I have to buy rears. Thinking about Q1, but they seem expensive and big, so I don't know what to match the KEFs with. Would like to get hold of rears at £100ish, but that might ruin the sound as well?...?