There really isn't much selection for 15" rims in anything that even resembles a performance tire.
I run Toyo Proxes 4's on my Challenger with 17" rims, and really like those. But I'm trying to keep my butterscotch Dart a bit of a sleeper, so I want to run a set of the Mopar cop rims with hubcaps. I also really don't want to run BFG TA's, since I know they handle like rocks. And I like to rotate my tires (not to mention run wider fronts for better handling), so I'd love to find something in a 235/60, but there really isn't much out there.