I'm thinking of getting a base 2.2GHz rMBP 15, and am wondering whether I will be OK with the standard 256GB storage. I have the same amount on my MBA, and it's generally OK, but I do find I need to move my VMs to and from external storage quite often. I generally need to have 2 VMs of 40-70GB on the SSD at any one time. I also use a 64GB flush-fitting SD-card for my "overflow" for items that I access infrequently, or that don't need a fast access speed (iTunes library, books, archive documents etc.). You obviously need to keep on top the "housekeeping" to prioritise the items that should be on the SSD, and move 2nd tier items to external or cloud storage every few weeks. The 512GB upgrade is quite a lot of money - and I need to consider whether it is really going to be worth it. What have your experiences been? Better to keep a "lean" system, or just buy big and avoid space anxiety?