just my 2 cents .... i've been in cars with a varyin TEIN setups ... alot of our car club members out here use them.
If they are HA, I would not recommend. Too soft. Altho if for dirt cheap prices, it might be worth it to give it a go. But pls bear in mind, in Asian countries like japan & HK, suspension kits rarely last more than 60K km (due to road conditions and driving environment) ... so keep that in mind when buying used import products.
Type Flex is probably the best bang for the buck choice. Some members have used them for over a yr and still not a single squeak out of them.
Altho I personally think the CS is the best. Cos it uses pillow mounts instead of just the ball on the top which prevents the "noise" as some ppl experience.
RA would be another popular model, altho I think its too hard and harsh, but definitely excellent on the track.
SS .... My personal opinion, stay away!