Short answer:
I would get the 14-24mm rather than the 17-35mm, due to my combo lens set. There is a 35-70mm, but it's definitely not as sharp as the 24-70mm. 14-24mm is also a better 'effect' lens compared to the 17-35mm, IMO. Bear in mind that the 14-24mm is a HUGE, HEAVY lens with a BULGING...