I was in a somewhat similar situation except that my old Peugeot was still in pretty good shape. It wasn't a high end bike but wasn't bottom of the barrel either. I enjoyed the Classic and Vintage nature of it, yet my eyes were wandering. I wanted dual pivot brakes, better wheels, and brifters. A little less weight would have been nice too.
I thought about getting a new wheelset and upgrading the drivetrain but after consulting some folks I realized what I really wanted was a different bike. So I sold the Peugeot and got a recent model road bike. There are times when I miss that old bike but I don't regret the decision.
Last edited by tjspiel; 07-14-15 at 02:28 PM.