Agree with Yogiboy. But if you can spend an extra $150 the SB-12NSD might be a worthwhile upgrade looking longer term. The bigger question is how you plan to integrate the sub with your monitors since that will be key. I think the Velodyne (former SVS) integration unit might be very well worth a look for more seamless integration. If need be I'd buy the cheaper sub with the integration unit, but that's just me. Best of luck.
Subwoofer for Beginner
I thought I'd experiment with a subwoofer with my Audience ClairAudient 2+2s. My room is an odd shape and bass is getting sucked out around a room divider that holds our TV. Can someone recommend a low cost small footprint (our place is small) subwoofer that would give me a taste of what a subwoofer can do? I want to see how it can work before I drop a bunch of money.