I'm getting ready to order a new 27" iMac with Retina 5k display. There are upgrade options available. I'm not knowledgeable with computers and would appreciate any advice rather than just guessing. I'm just looking for upgrade options that could improve the performance of Aerofly RC 7 Ultimate and will not be using it for anything more demanding. Aerofly RC 7 in the app store under system requirements, supported graphic cards, list: ATI Radeon HD 4850, HD 5670, HD 5750, HD 5770, HD 5870, HD 6750 or faster with 512 MB or more. Will the AMD Radion R9 M395X with 4 gb video memory work well?
Here's a link showing the few options that I have:
http://www.apple.com/shop/buy-mac/imac?product=MK482LL/A&step=config#
Thanks, Rich