The rears are Tein, I got them because they are a trusted brand, has lots of adjustability and was a direct bolt in fit. The fronts are Custom Compact, custom made ones with agx shocks, I got them because in my opinion, its the best possible setup available locally.
The spring rates I choose because there is a heavier supercharged engine in the front, and no weight in the back, I think the balance worked out quite well with the 7/4. It's good while not being too stiff, since there are a lot of crappy roads out there.