Thanks guys! I am considering going to 245 or 255 next year for my DSP '00 RS. When I saw this, I thought I would capitalize on having some experience in this thread. Based on the 225 V700 (17x7") I am running now, I didn't think you could get away with a 255s, without major mods. The camber discussion may be what I am looking for as I am currently running -3.2/-1.4 on the car currently with 9k/9k springs (note that the car is 2700# without driver). With the current setup, I have about 2-3mm to the spring perch, that could be increased with a little less camber.
Now that I see people have done it, I am more willing to take the wheel/tire plunge and play around until it fits.
Christian