recommended sub-woofers for tekton double impacts?


I am looking at getting the double impact speakers. My main concern is getting subs that will integrate well. My other concern is speaker and sub placement in my odd shaped room. Functionally it's 13x13 feet with an unusable 14 feet behind the seating position.
128x128chrono318
Rythmik. HSU is great too, but it doesn’t have as many room/system integration options (such as only a polarity switch instead of a knob).
@chrono318  I paired my DI's with a pair of sealed Hsu's--see my systems page.
I'm very happy with the result.  Gives me that solid foundation to just below 20hz that I was after.  The controls are quite helpful with system integration and I find that Hsu was a very nice company to deal with.  the value is very high on this product--just like the DI's.  I bet the Rythmics are great as well. Their gloss finish would complement DI's with an upgraded automotive finish.
I’m using JL Fathom F113. Awesome sub! When I turn it off I honestly don’t notice too much difference for music but it does integrate well. I run the DIs full range and crossover the sub at 45hz.