I've run 20x10 +45 WORK wheels they were great tucked nice with coilovers on 275/30/20".
Second, I've run 20x10.5"+42 on Vossen CV1 concave series with 265/35/20" on eibach springs and tucked in perfect!! A very slight stretch and perfect tuck!!
Third, I believe I answered on the second... Eibach springs best bang for your buck $$ I highly recommend these over ANY other suspension!!!
Check the classified: brakes/suspension section there are some for sale right now for a good price!! These come backed by a 1 million mike warranty...
I will have a set of eibach springs and eibach camber control arms and rear camber rods/bars complete kit for sale as soon as I can get them off my now Ex-M45! Friend I sold it to will be giving them back to me...
Good luck and enjoy your car!!
