The Avian Cadence Cranks are a 2 piece pro level crankset used by elite racers the world over and a worthy contender to the always-hard-to-get DXRs. Simply put, these cranks can be seen on nearly every gate at a world cup event, and if they are trusted by riders at the pointy end of the sport where the demands and stresses of blasting down a 8m high hill, then they're going to be more than okay for you champ. 
Hollow forged 6066 aluminium arms are guaranteed to be strong and stay straight under the highest loads, while a CNC machined 7075 aluminium spider will keep your chainrings on the straight and narrow.