Urgent as my NUS card expires tomorrow for the discount so I need to order today! Just wondering how much of a difference there is between the two iMacs, the Mid and the High spec: Radeon Pro 575 with 4GB video memory Radeon Pro 580 with 8GB video memory I will mainly be using it for music production, general browsing and some photo editing but I might want to run bootcamp and play games from time to time, not very often and I could always get a EGPU at a later date. So for my uses, if there a huge difference or not really? Its £2,241.60 vs £2,348.40 as I will be upping the CPU to a i7 4.2GHz and the HD from 2TB Fusion to 512GB SSD. Cheers.