So I'm looking to go clipless as I just ordered a set of Look Keo Blades Cromo for my ride. I'm looking for a my first set of shoes and heard great things about Mavic Avenir. I also hear lots of hype about SIDI shoes but seem way expensive. I plan to use these shoes for my training and all year round riding. Anyone ever ride these or recommend shoes? I tried on a pair of Shimano's at REI local today and they fit pretty nice and were comfortable. Now I wear a size 13 shoe normally and I heard cyclist should size them a half size up and I also hear people say get them snug. I've only seen select cycling shoes in a size 13 1/2. The Shimano's I tried on were a size 48 which is a 12 1/2 and had good space. Any help will be greatly appreciated.