For the last month i've been trying to decide if i should get a cheap 6.1 reciever. The problem is I don't think my living room is big enough for it. So i decided maybe i should get a better 5.1 reciever. In town they have a shop that sells all the new denon recievers, so I'm wondering if i should go with the denon avr-1603? I currently have a kenwood vr-507 an I'm wondering if that would be a big improvement as far as home theater sound goes.