I wouldn't suggest the Windsors or Merciers to anybody who wants to seriously ride (like you or me). Mercier and Windsor had a name a while ago but they were bought out and now they're cheap pieces of junk. They went the same way as many bike companies unfortunately but somehow came out worse then most. I don't think you should feel obligated to purchase a bike from the shop that fitted you. You'll be saving A LOT of cash if you get the motobecane and you can always help the shop out by getting things like tires, cables, lights ,brake pads, and other various necessities that wear out. That's usually what I do.