We're about to upgrade our TV to a 4k model and I'm going to need a Bluray player. The question is do I need to pay for an upscale or not. Two shops I've been to say yes, the player will upscale and the TV will then "fill in" to maximise the quality with its up scaling technology. Another shop told me not to bother, let the TV do the upscaling and buy a cheap player or if I really want quality buy a 4k player and play 4k discs.

So I'm a bit confused and any advice appreciated