unless they changed, JSpec uses KG/MM springs, and an RS*R exhaust (sounds good, i have an RS*R exhaust too!!<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt='

'>
anyways. that's why its harsh. the RS*R thru that site is 3/3kg spring rates (on s13, s14 is 3.8/3kg), about same drop as prokits and a lot cheaper. um..pesonally i would take the RS*R on just those 3 reasons
edit:
certain models of teins are bottom of barrel. imho. i have HEs so i have all the rights to talk crap. here's a few:
no stopper on the damper (can go 23 clicks but should only do 16 or it will destroy shock-blwo out)
small shock piston (when compared with Apex, JIC, Zeal, HKS..etc)
rust (certain models)
also, tein does make some
VERY NICE HIGH END coilovers, just not available in the USA unless special order.