what rear setup to run?

[ls1wot]

I am currently trying to decide between these two kits, and currently i am leaning more towards Bmr they have a watts link instead of a panhard bar. They are the same price but i haven't seen any proven track attempts from them? maybe they don't have the budget? Any one running the Bmr Kit out there that would be willing to chime in? My car will probably only see the track but i may take it out on the street every once and a while. dsster have you driven your car yet with the speedtech torque arm yet if so can you review it?
sorry for the thread hijack.