It was years ago that I first sat in a "Classic" and had to get back out--weather equipment installed--and take off my shoes. I wasn't wearing "welt-less" driving shoes at the time. Now, at 200lbs, still 6'3" and still size 12 shoes, I have an "SV" and couldn't be happier with it. Of course, I'm not trying to squeeze it between any cones, etc. Just some spirited, but legal, road driving.
Good luck with getting either one.