I was on the parts express site,they have the dayton sub 120 for 139.00 with free shipping. I am looking for a budget subwoofer would this be a smart buy. My rooms dimension are 22lx12wx8h, my intended set up is going to be an entry level system that consists of a harmon kardon avr 146 rated at 30 watts x5 all chanels driven.(I know pretty weak) some polk audio R50's( a bargain at the current price) and hopefully a good sub little sub. I am to any suggestions on any of the equipment mentioned above.