I would go the opposite direction and recommend the 1712 or 1713 if they have all the options you need. The 17xx series also has Audyssey MultEQ XT. I would skip the 19xx series altogether and jump up to the 2xxx series if you want something better. I have the Inifinity P363s also and don't have problems driving them with lower end receivers. Like was previously mentioned. It all depends on how loud you play and how far away you sit from the speakers. Notice I didn't say how large the room is. Room size only affects the subs, not the satellite speakers. Distance from the speakers is more accurate measurement. Even if you have a 50' x 50' room, if you're only sitting 5 feet from the speakers, you won't need huge power to drive them to acceptable levels.