I have the opportunity to buy the TEIN SA (I think he said SA but cannot find info on these) coilover for the S4 FC used for $600. (I think the price is high)

Would this be a good suspension or am I better off spending a bit more and go custom bilsteins. I did have bilsteins before but ran into issues:
https://www.rx7club.com/race-car-tec...-drama-999220/

Car will be daily and time attack for summer months.

 

looks like their new "Street Advance" coilovers... really far down the list as far as quality goes... I've never heard of them either.
http://www.tein.com/products/street_advance.html

You'd be better off with bilsteins.

 

What do you recommend then? As far as the bilstein? I can use my K2RD coil over kit then. (I hope)