2.6GHz vs 2.3GHz Macbook Retina

Hey,

I'm going to buy either macbook with retina 2.3GHz 16GB RAM 256GM SSD or version with 2.6GHz 16GB RAM and 512GB ssd. Do you think I may need the higher one? Here's what I need it for:

• I need this computer hopefully to stay with me for FIVE YEARS

• Lightroom 4, no more than 10 000 pictures in catalog (and probably Lightroom 5)

• atm I use 12MP camera, buy I will go up to 18-36MP in the future (but not higher)

• Photoshop

• Diablo III

• I won't be running PS + LR + Diablo at the same time. But probably PS + LR + Safari/Mail/iTunes will be a constant combo

What do you guys think? Is it worth paying extra for better processor?

Thanks in advance!
Wojtek