Thanks everyone for the input. I'm not a "wrencher" whatsoever and the more I think about it the more I migrate to a newer BMW as a track car.
In fact tomorrow I'm going to see a 100% stock 2003 M3 SMG with 18's (listed for $11K). I figure after some basic maintenance (fluid flush, etc), tires, alignment and brake pads, it's ready for the track. Plus I can beat the snot out of it and not worry much.
Daily: 2013 e92 M3 MW FR DCT ZCP / ESS VT2 650 S/C, MRF mid/Akra slip, ST BBK
Track/Airstrip: 2011 997.2 Turbo S PDK / 501 AWHP & 536 AWTQ Bone stock on a Mustang dyno
Beater: 2013 X5 3.5sport