I am also considering to get the Canon 6D... Even though I previously thought of switching over to Nikon's D600, IMO, Canon makes good gears, and the 6D seems quite powerful and versatile with it's WiFi function and low light feature... Though I gotta admit, the 1 Crosstype AF and lower details on higher iso (also softer) is quite a turn-off...
Now I'm just waiting for more reviews before deciding on 6D or 5DMkIII... but the price range of 6D seems to be best FF at it's price now... Am using a 60D now btw...