So I have been using a quad core 2008 Mac Pro for my editing for the last 5 years. I have invested a lot of time and money to really have not only a reliable editing machine, but also have a back system in place. Multiple drives, RAID, Time Machine etc. However, with the newer bodies which have massive MP count, this machine is slowly losing pace. Especially when batch editing and working with several files at once (not to mention my PS edits which usually get to 4GB each!).
I'm looking to get the new Mac Pro, but the base quad core model and upgrade over time as my needs expand. I don't do any video work so don't need the crazy 6+ cores, or the insane D700 video cards. My question is, what should I look out for to make editing smooth, especially when working with 36MP files in both LR and PS. Is RAM something that should be a priority? The Mac Pro comes stock with 12GB of RAM, but should I upgrade to more? How much is "enough"? I want to have the most seamless editing system in place and will be getting Thunderbolt RAID enclosures for storage and such. Any tips and recommendations for things to look out for?

