hey I have a couple of questions regarding these two recievers. I just built a large game room,and i will also equip it with a new home theater system. This room is about 750 square feet, with 13 foot vaulted ceilings. I know I will need a fairly powerful reciever, but i want to keep the price down to a minimum. I have heard that both of these brands are exceptional, so i'm not worried about reliability. What is the main difference between the two recievers except the sheer output power? My actual listening area for my new room will only be about 350 square feet, so i'm sure both of these will be able to handle that room size. These will be powering the klipsch rf-3 II series speakers and an svs pb-2plus subwoofer. Does this sound like a system that these recievers can handle? I really like the looks of the yamaha reciever and its back panel. Thank you for your help! One more question, what are OHMS?