I built a 5.0 system last year when I lived in a condo, and now that I have a house (and the ability to be loud) I want to add some more bass to it. My receiver is Pioneer VSX-816 (110W x7). My speakers are the Athena Audition series, and I have the F2.2's for primary front towers, so they already have pretty good bass response (dual 8" woofers on each tower, 250W per channel). I am trying to decide between a Dayton 8" and Dayton 10" for my sub. Are those good choices? I've heard decent things about them, and the price is sure nice. My room is 12' wide by 18' deep. My primary reason for getting the sub is for movies. Thanks!