Road bike type full carbon or half?

Trek sells a solid bike through its network of dealers. From the information you give, the Madone is a good deal at the price, a fair bit below the suggested retail price. Not only do you get a better frame, the components are also a big step up in quality. Just make sure the fit is right. With the other bikes, you might soon feel the desire to upgrade. If they use Tiagra components, you can't upgrade piecemeal, since the next step up goes to 10 speed. With 105 components, you could upgrade a single component because it would be compatible with higher end parts