I want to buy the Sony Muteki HT-M77 7.2ch home theater system but before I do I want to know a few things about it. Does it decode 7.1 DolbyTrueHD and DTS-HD-Master Audio soundtracks from bluray discs and does it have 4K pass through feature? I saw in some pics of the HT-M77 amplifier that 4K is written beside HDMI port labels so I was wondering if it has pass through feature. I have a 2014 Samsung 4K UHD TV and a Panasonic bluray player with 4K upscaling. The system costs $4299 here in Fiji. I would be very grateful if anyone who has owned this system can tell me if it's worth buying and has experienced any technical problems with it.