It's definitely not naive of you at all.
My advice would be to get the best frame that you can get for the money you're looking to spend that not only fits you well, but that you can also ride for at least a few minutes (the longer, the better). You need to ride the bikes you're looking at so that you can tell if they're right for you. Remember, looks aren't the most important thing in a bike, and you can only really evaluate the most important thing if you ride it.
With that said, I would really suggest seeing what your dealer can do about the price of the Cannondale CAAD9. The most expensive CAAD9 build over here (the CAAD9 5, according to Cannondale's website) is $1400US, but don't be fooled by the cost. Cannondale prioritizes the sale of it's most expensive bikes, so they don't stock the CAAD9 with anything higher than 105 components. The CAAD9 is the culmination of 25+ years of aluminium frame design, and the frame has multiple grand tour stage wins, and 3 or 4 Giro wins among other trophies collected over the years. It is a racing frame that is light, stiff and fast. In terms of value for money, it is the best deal of the bikes posted (aside from overall just being the best bike).