I have heard that the Tein CS are a waste of money. They basically give you a stock ride. If your going to spend that much on coilovers why not get something that will make you handle hella good. I would be hesitant to buy anything for my suspension with the word "Comfort" in it.
i heard that the CS (comfort series) rides similar to the apex'i coilovers. i really don't think they are the best tiens...they may be the best for comfort...not handling.
the ultimate tien setup would be the RS...aluminum/alloy body - stiffer valving
and more aggressive. shock is height adjustable in two locations (rebound and dampening???). i think it has a reservoir too...the ultimate!!! heh...
these are some ballpark prices that i found for the tiens...
HR no Pillowball - $1100
HR w/ PB - $1450
HA no PB - $1300
HA w/ - $1650
RA w/ - $2050
RS w/ - $2700
CS w/ - $1780
i forget how much the apex'i coilovers go for...it's right around 1200 i think...and i do not think they have one that cost anywhere near 2000 for the IS...
hope this helps...good luck...
2001 IS300 Graphite Grey
98 MB CLK 320 white
94 Supra TT/6-speed/HardTop/black
90 Integra pearl white