which is more stiffer and better in performance, the H&R cup kit or the eibach with koni?

by the way, what is so good about the cup kit anyways beside matched shocks?

also have you guys heard of this h&r camber alignment bolt, i saw it on the h&r website, is it any good?

thx

 

are these any good?

http://www.inlinefour.com/teinstecpers.html