Okay, admitedly I coming from a pretty pathetic setup (Bose Acoustimass w/ cube array), but I just got the PA120 sub and WOW. Hands down best purchase I've made in my current setup.
I just got rid of my Bose speakers, a Yamaha HTR-5540 receiver and Mits RPTV. I spent days researching on upgrades to the home theater, trying to balance price/performance. I bought a 52" Samsung LCD (A550) and sony BDPS350 blu ray, got an Onkyo SR606 receiver, Athena WS60's wallmount speakers (LCR), and added the PA120 to complete my 5.1 setup.
The sub shipped immediately and looks INCREDIBLE (cherry finish). After running the Audyssey setup on the receiver, my wife and I just sat on the couch in amazement at the sound. We are hearing things we NEVER heard before from the Bose cubes and acoustimass. The bass coming from the sub is incredible, and while I'm clearly no "audiophile," I can't imagine being any more satisfied by a higher-end sub. I have NEVER played movies just to listen to the sound, but boy-howdee how things have changed
I think all of you who are waiting to receive yours will be astounded at the value. WooHOO! Thanks to everyone on this site who allowed me to research all of my purchases and put together a great value home-theater!