which chainset/crank for triathlons/TT

marshy01uk Posts: 378
edited June 2011 in Road buying advice
Hi i am about to venture into building my own race specific triathlon bike that will also be used for some TT races.
I am 178cm tall with a 33" inside leg (crotch to floor)
What crank would you recommend and what length?
Winter/Training: Trek 1.9
TT: Planet X Stealth Pro with extra carbon bling!
MTB: Trek Fuel EX6 + GIANT XTC 29er
Race: LOOK 595
Fixie: Dolan
http://www.bmycharity.com/AberfeldyMidd ... eTriathlon