I cant comment on track experience with coilovers, but road use was shite... i mean shite. I had exe-tc fast road set up on mine, long sweeping bends a speed was a no no. The coilovers were fitted by a very reputable company, so the job was done right, the set up was done on numerous occassions until i finally through the towel in, the cost for immodium was getting out of hand....
I fiited standard KYB ULTRA SR shocks all round after suffering 2 years on coilovers, this transformed the car, i can now go through sweeping bends and a joy to drive...Prodrive had the right set up first time me thinks
try a thicker sway bar before wasting your money on coilovers, better still fit the KYB ULTRA 30% stiffer than the standard ones and dosen't compromise ride, you wont be disapponited..
My opinion, dont do it.