Rincew!nd

I'm likely going to buy Arma II this weekend so I can play DayZ and am wondering which version of the game I should buy from Steam. Combined Ops is the minimum I need, of course, but will there be any noticeable difference to the quality of textures if I go for the Complete Collection? Essentially my question is : Is it worth the extra money for CC, considering I'll be solely playing DayZ & none of the Arma II campaigns?

It does include the British Armed Forces DLC, but how significant will the improvement in textures be with this? Is it worth the extra?