Originally Posted by
Nagrom_
You'd be blown away by how mindbogglingly mechanically declined some people are.
It really is amazing.
Originally Posted by
hohum
Just buy a nice set of cranks. You'll most likely have to buy a matching bottom bracket too.
These are good:
Sugino RD2 crankset | Retrogression
Sugino 103mm bottom bracket | Retrogression
Don't try to do the work yourself if you don't have the proper tools (crank wrench, crank puller, bottom bracket tool) and enough patience to not brute force it. It's a new bike so taking it apart and putting it back together again shouldn't require raw strength.
RD2's get my vote as well. I've been very happy with them for the price and you're not locked into a high(er) minimum tooth count that a 144 BCD requires should you decide to do something else with them later. I'm really glad I didn't go with 75's or Records for this reason.