I would've done better in college - and probably have a better understanding of calculus today - if I hadn't tested out of University-level Calc I due to AP credit. I didn't really know what I was doing in the high-school course.

But I was a slacker and that experience doesn't necessarily transfer.

And yes, I'd generally favor stats over calculus as an additional HS class; however, I am hesitant about discouraging the opportunity to take either.