I think they're all expensive given the components and their weights (especially the
EBC at 10.3kg).
For only £100 more than the EBC you could have a
Planet X with mostly Ultegra (though they are out of stock on most sizes at the moment), which is miles better than any of those bikes IMO. It's a nice frame and will come in at under 8kg with the standard spec. My mate has one and he loves it.