Why not just get the GT-R. Fits 2 golf bags and then some. I wouldnt recommend it as a daily driver. It is up there in the comfort level with the GT3 lol. Why install all of those parts on the M3 when you can out of the box get the GT-R. GT-R basic Bolt-ons are stupid fast for about $5k.
Or as everyone said buy that members m3. Low mileage and has all of the work done already.
Current Stable: Some Audi with a V10, Couple of BMW's, one F Car, and one P car. One lonely GT-R with all the Euros.