Hello! I'm currently planning to buy the 5K iMac, but I can't decide what kind of storage I should get! Should I get 1TB or 256GB Flash? They're the same price, I know, but is the flash storage option any faster? If you need to know, I have only used around 150GB of storage in my PC, but I want this Mac to be future proofed. So, which should I get? 1TB or go full SSD?