I agree with the other posts – it depends on what you want.
After I burned through my stock mats in a year, I figured I needed something a bit more heavy duty so I picked up these rubber mats:
http://www.autoanything.com/floor-mats/64A2570A0A0.aspx
It actually looks really cool in the car (they were custom cut for the Box), and I don’t worry about tracking in snow or salt anymore. That stuff all melts and collects in the hexes in the mat protecting the carpet – every now and then I just hose the mats down. Very effective, very rugged and very cheap.