Bass Shakers are AWESOME. Nothing special for music, but for movies they are great - especially if you live in a condo/apartment/duplex instead of a detached because you will get to really feel the bass in those scenes with explosions and dinosaur stomps but your neighbors will never even notice.

You can buy them from here: http://www.partsexpress.com/pe/showd...number=299-028

You will need an amp to drive them, but no need for anything fancy, just get the cheapest thing you can find that has enough juice.

Meanwhile don't bother even looking at a Paradigm sub. Unlike speakers - where you want them all to be from the same "family" so that you get atleast semi-consistent timbre across all of them (particularly noticeable in pans) - subs don't share many frequencies in common with regular speakers so there is no issue of timbre matching.

For subs it is always best to go with companies that specialize in sub-woofers - the speaker companies usually treat their sub-woofers as a check-list item so that consumers can "feel good" that they bought all dem noise-makers from the same company. Some brands with a reputation for good bang-for-the-buck are Hsu, Velodyne and SVS.