I want to purchase a new road bike - i have mountain and hybrids already - and want to get more into sportive riding. I am looking at the above bikes, but am not sure which would be the best option. Obviously the Cannondale won bike of the year, but the Trek seems quite exciting and has a better group set. I can't find many reviews on the De Rosa, so don't know wether to discard this one.

Thanks in anticipation of your words of wisdom.