chucks, unless you are a pro, or be like me and go get the payless version for half the price! i think they are airwalks or something.
Only problem here is that the cheaper ones aren't built as well on the sides which is a problem if you do a lot of wide-stance stuff.
Other than Chucks the only shoe that I see a lot of powerlifters use is the Metal Squat shoe. At about $150 I'm not sure if they're worth it though.