Sorry you had a bad experience with adventon. You should call them to tell them what's up. I had a great experience with them.

I don't know much about the tein s-tech's. I've heard great stuff about their coilovers, but havn't heard anything about their springs. I'm sure they would be good though.

If I were you I would either get neuspeed sports, or H&R sports (that are for your car).

What is the product number of your current H&R's? I'm currious what they actually fit.