I don't think I've seen this anywhere in this thread, or any other I could find for that matter so here goes.
Is there a noticible difference between pedaling a 165mm and a 170mm crank? Every bike I've ever owned or ridden have been 170's. I picked up a 165 on a whim for a project bike, but was considering putting it on my daily rider for, well just to do it, it's new and my project will not see the road for a long while. And a side bar; if the cranks are 5mm shorter, do you need to adjust saddle height?