Glen is looking for a good 4K Blu-ray player for his parent's new Sony Master Series 4K TV. Scott Wilkinson says that Sony makes a great player. Last year's Sony X700 supports every format, including HDR10 and Dolby Vision. But this year's X800 does not.
Oppo would have been a good option, but they've left the business. Leo says that the XBox One S is a great option, if he'd like playing games as well. But he'd need to get a new remote for it.
Scott says that Panasonic's top of the line Blu-ray player does HDR10, DolbyVision, and HDR10+, which uses dynamic metadata. That's the one that Scott would recommend.