Looking for a good half-sheet pan

I'm looking to invest in a good sheet pan. I want something that I won't have to replace for a long time. Something stainless steel or aluminum, heavier gauge, non-coated. Cook's Illustrated mentions the Wear-Ever Half Size Natural Finish Aluminum Sheet Pan, but reviews on Amazon suggest that it warps at higher temps. I've also been looking at the Nordic Ware Bakers Half Sheet, but am not sure about the sturdiness. Any help from the professional world would be much appreciated!