You're not going to find many people that have owned all four of your options. In terms of a popularity contest, most people will say the CAAD10. I recently went with the 10-4 as well because of the good reviews, and since a lot of people online own one, it has a large user base to vouch for its quality and durability. The other bikes you mention are a little less popular, but as far as I know they could be better quality than the CAAD. The best thing would be for you to find a bike shop that has these brands and lets you test them out.