I used to have a Jetta GLI that came with "Monster" mats. These are the thick, rubber mats with deep ridges -- specific to the vehicle. I loved 'em.

I really wanted something similar for my Mustang. Took a shot on these, and I'm glad I did:

http://cgi.ebay.com/ebaymotors/ws/eB...=#ht_500wt_956

They fit great, are made of a thick rubber, and the mustang looks awesome. If you like rubber mats, and your carpet is black (or close to it), I highly recommend them.