As someone who has been involved in a few hundred motors like the kind in question, simple advise is.....Use the best parts you can afford. Look in the National Dragster or Racing Junk and see what kind of engines are the brand X guys selling and using to go your desired speed. Then build accordingly. Stop driving yourself mental trying to keep up on the latest thought or theory that may or may not have anything to do with building power or longevity. To the OP I have used both kinds of cranks at your power level and honestly do not see a "major"advantage either way. I do know that at that level the better quality cranks do seem to look better on tear down as do the bearings. Just an observation from the cheap seats.
Todd