i actually initially built my surly with whatever-i-could-afford parts-- crappy used stuff mostly. My chainline was laughable. My cranks were nasty used Deore mtb cranks. My front wheel was probably meant for a hybrid. Hey, it rolled.
Then I fell in love with the bike, and returned the love. The switch to Sugino 75's was definetely a worthwhile investment-- improved handling, smoother pedalstroke, overall just nice. Switching wheelsets was worth it, too.