For those who enjoy playing fighting games with a gamepad controller, this one is probably the best. Saw it on clearance at GS for $29.97 (original MSRP $44.99). Deal appears to be online as well. Looks to be the cheapest price at the moment. After playing Street Fighter 4 with one of these, I haven't gone back to the standard controllers.
If you are on the fence, here's a detailed written review of the controller: