danny_boy said:

The Blu Rays(especially upscaled to 4K) are spectacular. Incredible levels of detail

Wait, how 1080p can be upscaled to 4K? First of all if the signal is Full HD then - when transmitted - regardless of what def a receiver is it will still be 1080p. When Blu-ray is played on so called "4K" display the image is downscaled to High Definition. Second, 4K is a professional term. There's no such thing as 4K TV, projector or any other device. Ultra HD (horizontal res 3840 pixels) isn't synonymous with 4K (4096 pixels). 4K rather is a marketing gimmick by the large corporations such as Sony, Panasonic to push its overpriced products. You may want to read and watch this:

http://www.forbes.com/sites/jeanbaptiste/2013/01/08/ces-2013-why-ultrahd-is-not-4k-video/