I'm going to order a Bike Friday Pakit SS 16" folding bike. I'm trying to get it under 18 lbs and put components on it that I won't want to upgrade later (got the $ now, may not have it later on). It comes with a pretty generic drivetrain setup.

"Alloy single 165mm 130 53t w/alloy chain guard 111.5mm BF Standard BB, Sealed 68mm English"

Any suggestions for a crankset that would be lighter and more durable (if not an oxymoron) and not more than a hundred bucks? Definitely not looking to spend $350 like some I've seen, but around a hundred (or less is okay).

My first single speed so I don't know what to look for...thanks.