If you are refering to the new Kappa's, then I would certainly reccomend them. I recently auditioned a 12" pair and was nearly shook out of the room. The Kappas hit incredibly hard, and precise. Minimal Breakup, and great frequency response. They even handled 30 and 40 Hz sine waves and pink noise effortlessly.
I would love to get my hands on a pair of these, possibly for my other car....
They are definately worth looking into!
take it easy,
-zane