My current system comprises of a fairly decent Denon Amplifer and a set of Mission M73 floorstanding mains. It is time for 5.1 and I am thinking of geting: Mission M7c center. Mission M7ds rears. Sony SW-MA 40 subwoofer. Denon 1602 Receiver. My room is quite small and I don't require huge SPL levels. Is the 1602 good enough for a room 10.5 feet wide by 10.5 feet long by 7 foot high? Is it worth saving up and getting a higher model 1802 or 2802.