I love my m3, and love driving it on the track, but am worried about the cost of damaging my m3.
if I added BBK+wheels+tires I could easily buy a spec miata with the thought of eventually swapping in an ls2 or so.
if it was just a spec miata, I'd keep my m3 for the track, I've ridden in several instructors and have a ton of respect, but I like having the power coming out of corners. Corners are great in a miata, but straights are pretty anemic.
even with an lsx swap, I'm a little worried about the miata. I LOVE the high reving v8. when I watch videos of z06's they shift so low in the rev range, just doesnt seem as fun.