Has anyone here heard this subwoofer? I'm not interested in huge output, considering my listening room is so small (10' x 12'). I'm only curious to know how fast and tuneful it is. I'd like a sub that's agile enough to keep up with my Merlin TSM-MMe bookshelf speakers. So far I've narrowed my choices down to the Rythmik F12G, the Martin Logan Grotto (I like its looks), ACI Force XL, and the Epik Vanquish. I've read very favorable reviews for all the subs above, except for the Vanquish--I haven't found a single review of it, formal or informal. Any input regarding the Epik Vanquish would be very appreciated. (I should also note that I'll be using an external eq for the sub, so eq features are not important to me)