Hello I want to upgrade to parallels 18 and I am going to buy a 2019 imac with retina 5k display and I want to continue using my virtual machines with windows 7, 10 and 11. Normally I use the Vms in the Coherence format or in a window, I don't usually use full screen although I do sometimes. I've read that there are problems with Windows looking nice and crisp on the Mac. Can you tell me if I can find any display problem? I currently use iMac (no retina display) and everything looks perfect. Thank you.