Assuming you're looking for a general mountaineering 'pon (i.e., horizontal frontpoints), then you could look at the Petzl Irvis, Black Diamond Neve or Grivel G10. (More than durability issues, I'd be wary of aluminum 'pons because they're harder to [impossible to?] re-sharpen, unlike the steel versions.)
Personally I have a pair of Petzl Irvis 'pons which work fine. Haven't used any others yet, but I doubt you could go wrong with any of the major brands.
If you can, bring the bootz in to a retailer to see if your prospective 'pons fit the boot well. If you're into online purchasing, you can check over at SummitPost or RC.com to see if there are any boot/crampon issues with the one's you're looking at. Just type "Nuptse" and "crampon" in the search box...