BMW E46 of some variety, preferably M3, will be your best bet for a genuine 4 seater that will do all jobs as reliable/comfortable DD, auto-x cone carver, and track toy. The BMW E36 M3 is the Swiss Army Knife of cars. E36 M3, it's the E36 M3.
How experienced are you with Auto-X? If you're looking to just get started, I wouldn't stress about finding the competitive car, because you won't be a competitive driver yet. Pick what's most enjoyable.

