Hmmm I am in the weight weenies Forum . Oh yeah I should get Dura Ace when there are crank sets 200 grams lighter
Oh yeah, I guess we didn't know that.
There are lighter crank/BB combos, but don't be fooled. There is nothing better. The DA cranks are bombproof. If you get any cranks with ISIS you will be riding an inferior product. The bearings are horribly small and wear very fast, all you will have is problems. DA you put it on and forget its there.
AS for weight savings, the most you can save on a good set of cranks would be 180g by using THM cranks, but you better have $900. AFter that your back to ISIS and the max weight savings is about 140g with Pulsions and AM Classic BB. BTW, my weight savings are just cranks and BB, not chainrings.
Remember, lighter isn't always better. Unless, maybe you get the THM cranks.