Why a carbon bike?
A great thing to do in the winter is to ride a heavier bike. A nice bit of training
![Wink ;) ;)](/styles/default/xenforo/smls/wink.gif)
Especially as it can be harder to get the miles in during the winter due to the weather and it's not always safe to go as fast.
I would buy a good alu/steel/ti frame which is cheap to run and can take full length mudguards.