Auto-X/Street Tire Choice.

[Loren]

Any of those would be fine for street use and mediocre for autocross use.

For serious grip, the current best street/autox tires are (in order from good to better):
Hankook RS2
Falken Azenis
BFG Potenza RE-01 (on closeout, possibly cheap)
Dunlop Direzza Z1 Star Spec
Toyo R1-R

Most of those can be had for under $100 in 15" sizes (except the Toyos), don't know about 16s. Check the status of the closeout on the RE-01 at the Tire Rack, the prices were GREAT, and it's a fantastic tire!