Very good point Mr tmsn
as for triples, I know we come across as a bunch of old goofs stuck in the past, but triples sure as heck have advantages on a bike that will have 25 or 40lbs of stuff on it in hilly terrain.
the fly in ointment is if you want to use brifters and more than 9 speed, and even then it's sora level, which admittedly is a lot nicer now than old sora.
newer doubles can have a very good spread too, but you really will want to understand your gearing needs to make a good crankset choice
give us your gear inch range thoughts on this?