If gives you the option of adding lower ratios with a larger cassette later on...for example if you get to the Alps or similar riding...
I'd go with the crank...maybe consider the great buys on last years models...I know I don't flex my square taper model...you get the same results at a far reduced cost...
If you get a great deal on last year's model if the rest of your bike is Record you can stay Record and spend maybe even less...the deals are out there (or were a short while ago when a friend was looking)