I considered TEIN at the begining, but then I started thinking, why am I going to pay $400 more than what the Koni+GC cost, I get no benefit out of it that I can see.

Both give me ride height adjustability, both give me dampening adjustability.

KONI+GC allows me to choose my spring rates, the KONI's have a lifetime warranty, and if I dont like the spring rates I have, I can get new ones for $60 a spring.

I didnt see the benefit of paying more, others might be able to help here as I am not too familiar with the TEIN FLEX, but from what I understand they are one of the low end systems. Ill give the FLEX this much, that EDFC did seem like a cool set up, in car dampening control.

 

I'm running GC/Koni 400/425 rates, my favorite mod so far. And it definitely handles better than stock...

 

Another positive with a coilover kit such as GC is if you cross a thread, the sleeve corrodes, or the seat seizes, you can easily get a single replacement part for cheap.