Another motor combo question

I read thru a lot of past posts for a good crank stroke in a tfx hemi. I'm still in the parts faze of ours so i could change. I have every thing but the crankshaft. 4.50 was what the plan was, but i could go less if it is going to make the motor that much more reliable. Its in an altered with a 1471 kobelco, so i dont have to spin it crazy. Any thoughts would help. Sorry if its a goofy question.
Thanks

 

this is just food for thought..4.310 and 4.500 is a very common combo,,lots of stuff out here for sale that run that combo..Dave