Sorry guys...come in here to save the day! (j/k)...If price is no option and it is just used for the track, get dymags...but they are NOT suited for bumpy-ish road use. After that, I have not found anything that is lighter than the HRE C93...They will be on their site soon-ish (unknown to me) but they should weigh in at like 19.x lbs for 19x12!!! so much less for 19x9.5/10
pics of the c93s and all other c9x series (c9
3 lightest by a very small margin of ~0.95 lbs to c97, etc) can be found here:
http://www.6speedonline.com/forums/s...hre+c97&page=2 middle of the page-ish
i will be getting the c97s when I get my car.
About the performance, you should definitely feels a large difference as it would probably save at least 8-9 lbs/wheel...the M3 OEM 19s are heavy.