Cx bike for commuting (and sportive rides eventually)
I'm new here and new to cycling and looking for some advise on my first proper bike. I'm due to get a bike via the Cycle2Work scheme, but as yet I'm torn on which bike to get. I have chosen cyclocross as they are a bit more rugged for the commute, and hopefully I'm able to put some slicks on it for the odd sportive road ride in the future.
I have been looking at the following (i'm stuck to Evans Cycles):
Norco Threshold A3 2014 (Sora 9 speed 11-32T, 46/36T chainset) £650
Fuji Feather Cx 1.3 2014 (Claris 8 speed 11-32T, 50/34T chaiset) £700
From what I understand the Norco has the better gear set but I think it is a good bit heavier (over 1kg more) than the Fuji (11.14kg). Should this weight difference matter much given that i'm not intending on throwing the bike over my shoulder for CX races?
I also like the fact that the Fuji has a compact chainset which is better for on the road, is it possible to fit a 50/34T to the Norco?
Finally, I'm open to some suggestions other than these, but I don't really want to go above £800. I've also read that cantilever breaks aren't the best so would like to stick with discs if possible.