you need a genie 54 or the H17 anlong with the C61k's for 4k.. there'd very limited 4k content out there. but when there's something that intrests you then it's a jaw dropping experience!!! then again were running 88 inch sony OLED'S!!!
Got the 17 and added a wireless receiver and one more 4K receiver. All free upgrade. Installed yesterday working fine. It is a lot faster. Thanks for all the input and information guys.