That CB is not pretty is it?! Can't see how it's very good value with those components either.
I'm more than happy with my 2015 Boardman CX Team at sub-£600, although it's taken a new BB, new second-hand wheelset and quite a bit of initial fiddling with set-up to get me to this point. The liquid silver paint job looks great, and it's pretty light and nippy with a change of wheels.
If buying a CX again with a circa £600 budget my first choice would be a Genesis CdF (though might have to be second-hand at that price) and second choice probably a 2015 Cannondale CAADX in the sales.
The CB would be well, well down my list I'm afraid.