Im thinking about ordering the 2999 BTO config with i7 and higher end GPU. But im not sure whats the best route as far as storage. I currently have a top specd i7 late 13 13 MBP and i plan on upgrading the ram in the iMac up to 32gb or whatever the max is. So what i want to know is... What exactly are my best options as far as storage goes. I absolutely need SSD performance. Can i go with the 256gb ssd and make my own fusion setup. Or is it better to just go with their 3tb fusion drive upgrade option. Ideally, id want at least a 512gb ssd in there but that apple up-charge is waaaaay to much for my liking.