If you cannot find the SW800 towers (5 10" drivers per speaker) you may be able to find the smaller SW800's (I think these had two of the same 10" SEAS per speaker). The key is getting the SW800C crossover which has software specific to the CLS. The Kinergetics system is the *only* sub system specifically designed for the CLS. The ML Decent and Depth subs are designed for later models (way different animals than the CLS) and really are appropriate for HT use, (even the guys at ML will tell you so).
Contrary to the usual approach of crossing over as low as possible, the Kinregetics/CLS combination is best crossing at 110htz with the 17db Butterworth high & low passes. Using tubes on the panels and ss on the subs sounds best to me. BTW, Tony DiChiro claims that the SW800's, due to their physical configuration and the crossover circuitry, approximated a line source down to 200 cycles when tested. In any event, the mini-Statement confirguration is the best I have heard with the CLS. I'd rather listen sans subs, which while different is quite good, if the SW800's are not an option. So, maybe looking for the smaller SW800's (with stands) is worth a try provided you get the dedicated crossover. The Genesis towers may the best option if you decide to "wing it". Good luck.