check out these 2 reviews of the RDlogics cvd's and the MIP cvd's
http://www.misbehavin-rc.com/reviews/mip/cvd/cvd.asp
http://www.misbehavin-rc.com/reviews...cs/cvd/cvd.asp
There's really no need for the ue ones, unless your running a very powerful system or if your a serious racer.