Not sure I agree with you about the tire wear. On my E39 540 M Sport, hard cornering wore the fronts down faster than the rears. May not happen on the M3, but it can (and did) happen on the E39.
I couldn't track the vert with BMWCCA even if I wanted to, and highly unlikely I would ever autocross it. (Would rather spend a summer Sunday on my boat than in a parking lot or on an airstrip). Plus I got my fill of track days when I was instructing with PCA.
And while the PS2's are awesome in the dry, last time I checked their wet performance was nothing stellar. (It's been a couple of years, so I may be wrong about that).
Anyway, I'm interested in feedback, so tell me if I'm way off the mark here.
2014 328i Sport Wagon
, Glacier / Black, ZSL, ZD2, ZD3, ZDH, ZLP, ZPP, ZTP, and H-K
2011 535xi M Sport
TiAg / Black, ZPP, ZP2, ZCV, ZCW, ZDA, 2TB, 6NR, 465, 5DL, and a Partridge in a Pear Tree
2011 X5 35D
2008 ///M3 Vert
2008 X5 3.0
2007 X5 3.0
2006 X5 3.0
2006 550iA SP
2003 540iA M-Sport