16-235 is proper for video, but ideally you want the pc and the tv to match...so if your pc is outputting PC range and you cant figure out how to change it, use PC range on the TV...or vice versa. Vivid is usually THE worst setting you can use on a TV if you want technically proper.
There are a couple caveats however:
1) It's your setup, you are the one watching it, so do whatever looks good to you. People can jump up and down all day about how unproper your settings are, but if you like it that way better, you're the one watching it, not us.
2) Assuming you do figure out how to match both ranges between the pc and tv....some consideration needs to be taken for other uses of the connected PC. If you are doing other PC things like playing games, surfing the web, etc and not just using it to output video, the full PC range may be the better compromise for you despite 16-235 being more correct for video.