I just won a Sugino 75 crankset on eBay. I am buying only the arms and spider. So now I need a 144 bcd chainring. (I'm looking for 46 T). How do I determine the quality of a chainring? I mean, a Sugino or Campy or Dura Ace chaingring for this crankset would be pretty expensive. How much might I appreciate a high end chainring? This is for a fixed gear street bike. I'm no track star. Any thoughts appreciated.