I am about to receive my new MacBook Air and would like to buy a new external screen. Ideally USB-C and 27 inch. Anyone assist with best buy and, also, thoughts on the new Dell C2722DE with camera. Two questions really: what screen will best replicate the high quality screen of the Air and, 2, I would like in time to replace my desktop Mac with a Mini, and use same screen for both. Dell seems to have a KVM feature. Thanks for any advice.