Thanks for all the responses.The problem is,now I don't know which wheels to put on the car.My newly refinished phone dials look SO good I'm thinking about using them instead of the Design 90's. I followed all the advise about the Wurth paint during the refinishing process and the results are great!!!

This topic came up on Rennlist yestarday. The consensus over there was to go with 15 inch wheels for an 2.5 na 944, assuming you have stock brakes.

Here's the Rennlist thread