I'm in the market for a new subwoofer and am going back and forth regarding how much to spend. In a perfect world, I'd love to drop $500-$600 and get a nice SVS subwoofer but there are other things I could spend an extra couple hundred dollars on right now. So, since I have two HT setups I began tossing around the idea of getting a lower priced sub now and in a few months getting the SVS and moving the other sub to my secondary system which has no subwoofer currently.

If I were to spend $200-$300 what would be a decent quality option. My main room is 15x20 and we watch DVD 60% of time, listen to music the rest. I've seen some reviews on the JBL Northridge E250P and they are favorable. Any other solid choices I should be aware of?