If you don't mind, can you give a little clarification on what the differences are between the Nuvola NP-1 and other receivers being sold now such as the Marantz - 1540W 7.2-Ch. Network-Ready 4K Ultra HD and 3D Pass-Through A/V Home Theater Receiver? Most of the details are referencing sound and streaming Pandora, etc., but it also lists "1080p and 4K Ultra HD (3840 x 2160) video upscaling functions".