you'll need 16 rims for the Bridgestone RE01Rs last I heard they do not come in 15 inch
i love the Koni with my Ground Controls (600/650)
I basically have the same set up as you are going for minus the 4 point harness and other equipment that is stock but on the car. a friend of mine, Charlie, showed me how to adjust my seat so I won't move when I go around the course. So much nicer on my back.
hope to see you out.
when you are ready for a corner weight and balance check out Cars & Concepts or Vortex Motorsports. I love what C&C did with my hatch.
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if you can only race me in a straight line then whats the point 
...91 SMF SCCA
http://www.flickr.com/photos/8341770@N07/5601083432/http://www.flickr.com/photos/8341770@N07/5601083432/ by http://www.flickr.com/people/8341770@N07/, on Flickr
I see people out there spending money on the car to improve it … If you spend half that effort just working on your driving skills, making you and the car work together as a team, then you’ll go faster – period. To make the car go a second faster on the track takes a lot more energy and money than making yourself drive it one second faster.
– the late Tom Thrash SCCA Solo E Production