Finally got the 58"  Sharp UE630X, replacing the 40" Sony Bravia it's a noticeable size improvement as well as PQ improvement.

I'm not sure if I got the Audio to work properly but I used Optical Out to my Anthem Mrx500 Receiver and so far managed to get my external speakers working. Is this the only way?

Did a check and found out there is a firmware update. I noticed there is Netflix preinstalled after the update.

Didn't have much time to play around with it yet but I did try out some 4k movies from Netflix and it plays well on a Maxis 10Mps .. Not sure if it is running 4k fully but looks very sharp. Also tried Google cast and works just like Chromecast. Will post more feedback when I have more chance to test it.

sharp ue630x can take 2tb hdd, ntfs.

it can playback the common formats; can even play bdmv. the video quality output is good, not inferior to other media players.

expected, some minor disadvantages compared to full fledged android media players - the display for folders/files is poor, words too small; every time u change hdd, may need to power off/on due to slow reading or error; navigation incl subs, audio tracks a little clumsy. lastly, the usb ports are all at back of tv and not side - problematic for wall mounts and hdd's with short cables.