Of the available choices, the Specialized S-Works looks to be a lightweight high-end crankset, and it shares the Campy UT Hirth joint design. The problem is that is comes only with the Specialized oversized BB. I don't know how involved the re-engineering would be, but if Specialized could produce their S-works to a standard BB size, the S-works would appear to be a good option.
The Specialized crank uses a large-diameter aluminum spindle and an oversize (nonstandard) shell.
Best strength-to-weight crank on the market featuring standard and compact spiders/rings (sold separately) compatibility and oversized alloy spindle with Hirth coupling interface.
* 2nd generation hollow carbon crank arms offer superior stiffness
* Oversized alloy spindle with Hirth coupling interface
* Self adjusting oversized 42mm cartridge bearings
* Fits Specialized frames with oversized bottom bracket shell
* Fast and smooth shifting S-Works chainrings, available in Standard 130mm with 53/39t chainrings or Compact 110mm with 50/34t chainrings
* Additional Standard and Compact compatible spiders and rings available separately
* Natural gloss carbon finish
* Weight with Compact rings - 623g (172.5mm crank including all hardware)
* Weight with Standard rings - 635g (172.5mm crank including all hardware)
$625.00
http://www.specialized.com/bc/SBCEqP...jsp?spid=35857