Remember reading the relative weights of the groupsets and 105 is by far the heaviest out of Veloce, Apex and 105.
Bit of a difficult question, but I suppose that having shimano/sram gives you LOADS more options in terms of wheel builds/factory builds, chains, etc etc. Campagnolo is good if you like it, but a little bit less flexible in terms of what you can pair it up with.
Remember reading the relative weights of the groupsets and 105 is by far the heaviest out of Veloce, Apex and 105.
Bit of a difficult question, but I suppose that having shimano/sram gives you LOADS more options in terms of wheel builds/factory builds, chains, etc etc. Campagnolo is good if you like it, but a little bit less flexible in terms of what you can pair it up with.