First, carbon. You already know you don’t need it for your casual weekend pursuits, because you’re not counting ounces the way a professional road racer would. But to quote an article from Velonews, “Remember that professional athletes operate in an entirely different environment than the rest of us. They are all very close to each other in terms of fitness, and they are also all very close to being the absolute best a human being can be. In short, you’re much better off upgrading your legs and dropping body fat through proper training and diet.”
Do not take your Bike to Kyle's Bike Shop they handled my bike so poorly they can not work on Vintage Schwinn' and the attitude they had if it wasn't a high dollar bike don't expect good service. I had to find my own parts, had to take the bike back twice to get the wheel trued and they ruined my bike it is so scrapped up the Schwinn is gone on the side of the bike. If you care about your bike do not take it here.