I recently purchased a Mac Book PRO Retina 2.3 GHz with 8GB RAM. I've been waffling back and forth about the RAM... Is 8GB enough or should I return this and get one with 16GB? I don't do any heavy computing, just basic stuff. I may dabble in Photoshop in the future or maybe something graphic wise - and I recently started playing WoW which runs fine. It'll probably be the only game I play on this. Any tips? Suggestions?