Okay, I blew up my 10" JBL sub and I need to get a new sub now(along with a new receiver to replace my Yamaha HTR-5650. . . . . . .i'm looking at the Denon AVR-3310CI. . . .am i on the right track?). So I have been looking at the Velodyne's and the Martin Logan's. I want to spend around $500 tops. So what would you all recommend? My Home Theater/Living Room is a 500sqf rectangle.