My 2011 Imac with 2.5 Ghz i5, 512 MB video memory, seems to be very slow - seeing the beach ball and hearing the hard drive working. My first thought is to defrag the disk, but everywhere I read it says it's mostly unnecessary.
My second thought, is it is time for an upgrade.
I use LR and Photoshop every day, do sceencasting/recording, and light video editing using FCP
In researching an upgrade, and reading many reviews it seems like the 5K IMac is best to get with an upgraded processor, or video card which puts it out of my budget.
I am probably going to get a 27inch non retina because quite honestly I will value the speed more than the display. With that being said, knowing that I will upgrade the RAM myself, what would you put in order of importance when adding options - processor speed (high end i5 or i7) , graphics card memory, or "fusion drive"?
What are your thoughts?

