One thing to consider with the Teins is that they use an oddball diameter spring, so you're stuck using their springs if you want to change spring rates. If you get coilovers that use a standard 2.25" or 2.5" spring, you can readily get springs in whatever length or rate you want from Eibach or other spring manufacturers. I've got Intrax coilovers, which use 2.5" springs, and I'm very happy with them. I was originally going to get Teins until Rod Millen Motorsports told me they recommend the Intrax over the Teins for track use for that reason. If you plan to spend time on a racetrack, you'll probably end up fiddling with spring rates, and being able to get the length/rate you want from someone like Ground Control in a day or two beats ordering them from Japan.