I'm thinking avout diving into an Epic 60 package minus the sub, my question is i've heard they can be bright with some receivers, will a Yamaha 7 x 100 (probably 70 x7 watts in real life)be a good match (sound wise)?? Will it have enough power to drive this system well in a 14'x18'x9' room??, or will i need external amps to make it shine? This system is 95% home theater and xbox 360.