Are you autocrossing or doing other driving events? If you aren't than might I suggest spending it on something cooler for looks and/or sound?
I'm not saying that it would be a waste of money, but unless you are pushing your car to the limits I think suspension mods would hardly be noticeable other than maybe a harsher ride. The bottom line is these cars handle awesome and unless you need that extra bit of stiffness for racing I just don't think you would be happy with the results (unless you like the harsh ride of a stiff suspension).
If you are racing please let me know how your mods work out.
In my case I'm considering a bunch of mods to try and make my car faster and handle better and frankly I'm coming up empty in terms of bang for my buck. A little here and a little there might help a little, but I then will be moving to a different race class. I'm thinking of saving my money and putting it into stereo and overall looks. I sure do like the clear headlights and the GT3 bumpers!
