You really need to try a few bikes and see what you like the feel of and what fits you best. Sweeping generalisations very seldom help, what I mean is, if the CAAD10 was an 'out and out' racer, there's no way I could ride mine all day. It makes a for a very comfortable ride IMHO, but each to their own I say
This is good. When I pick up a bike mag the usual re-mortgage priced bikes are the ones I would class as 'out and out racing' due to their aerodynamics and expensive carbon.
My first steed was a lowly Boardman Comp that I picked up for £600 (display model). Not that this was uncomfortable when I tackled long rides and sportives but I did take out the spacers and made it ultra aggresive compared to my now relaxed geometry on the Enigma.
I will eventually turn the Comp into a TT machine I think, it will then get used as the dedicated turbo bike for winter.
When directly comparing the boardman to the enigma when factoring comfort levels (i.e. really analysing the nuances) the titanium really does soak up the road buzz. The other chief factor to seal the deal on the titanium frame is that it should last a long time and be able to haul a light tour load when I feel like a short holiday or sight-seeing.
I hope you have a broader choice now Jonny, try a few models from more than one shop then narrow your selection down to two or three. As your spending a tidy sum it's important that you don't rush in and get carried away. Good luck hunting!
Gareth