Debating switching my 15 2015 MacBook Pro to a nice new iMac 27 as it never goes out my house anyway. I mostly do graphic and web design but do play a few games on bootcamp (nothing too intensive) and edit the odd 4k GoPro footage, is the Radeon Pro 5500 XT a worthwhile upgrade for the additional £300 cost vs the 5300 or is the difference very small? As I'm upgrading SSD anyway Im pushing stretching my budget as it is.