[gizmo335i]

A 335 with 15K in it (done right, obviously) could be WAYYYYY better than an M3 IMO.

Yeah, first get Ohlins, LSD and all the M3 bits tibra mentioned. <<He did A LOT of research on suspension before getting his setup.

Get some HRE wheels with some good tires.

DP's, FMIC, Flash/piggy, intake and exhaust are givens. There are quite a few to choose from for each so search and read up on all.

After all that, you would have more than enough money to maybe even get the bigger turbos. I have read from a couple people that have them and say they have problems getting traction (wish I had that problem). But if you have the base...and you will with that suspension setup...go for it.