I'm interested on your impressions with the rear shocks. My guess is you will be putting them on their firmest available setting. I hope to hear they ride great. I think you will find the front is a bit stiff too.
We are running many of the same items. I have the same front coilovers, same kalphenke top plates... the same rear springs and perches... a strikingly similar FPR setup, and even he same front and rear spacers. 20/25 Running an 18x8 wheels... ET 55, with 235/40/18 shoes.
The kalphenke gear is the nicest gear in terms of quality that I've ever purchased. I think the front coil overs I may replace with koni yellow adjustable and drop springs. It's closer to a track stiffness and less streetable, IMO.