Which subwoofer?


I have a small room (10’x14’) and am wondering if a subwoofer would help. If so, which one?

I have Martin Logan electrostatic speakers with  8” powered 200 watt woofers and 8” passive radiators.  The bass is articulate, but not very deep. I am wondering if I could get more bass volume and depth without loosing detail with an additional subwoofer?
I have tried an 8” Velodyne, but could never integrate it with the Martin Logans so I sold it. 

The Martin Logans are powered by a 200 watt McIntosh receiver. 
Any thoughts?


kenrus
Having run at least 10 different subs with my ML Summits I can safely say that the only subs I ever found to be fast and accurate enough for those speakers is the SVS SB 1000 in stereo. Don't waste your time and money on the rest of it I've already done the research and paid dearly for it.
The new x series from REL are incredible. Check out my T/7x review on their website www.rel.net 
I agree about looking at REL.  They are the first subs that integrate with my Maggie 3.7s.  Very fast and great quality.
Two Rel T5i's, a Rel T7x and a SVS SB2000. Fixed 90% of my low frequency issues.