Personnaly I'm going the other way and will be moving my red/force kit off bike 1 in favour of trying the new dura ace. I've put dura ace 7800 on bike 2 and after getting some decent mileage on both now I much prefer dura ace. The shifting is far superior especially the front mech. I prefer the quiet shifts too and the dual lever system. Miss a shift on SRAM going up hill and you can find yourself in a harder gear.