what settings should I use for my vizio 42 inch 3d smart tv?

Vivid Mode is not for home use. It is for store demos in very bright ceiling lighting and is much to bright for the home. You have to try the different modes and realize that the setings are set and saved separately for each mode and input connections Not two installations have users with the same eye characteristics, day and night time lighting conditions, Input devices such as TV STBs, DVD players, or local broadcast characteristics. For this reason there are no standard settings. I have a different mode set up for each of the following from cable company STB. Movies, live 720p sports, live 1080i sports and live in a studio programs.

Set your own pq using a calibration disk such as the free AVS HD709 disk or commercial ones like Wow, DVE, etc.

Which does absolutely nothing for your television but tweak it to that particular movie. Performing Accurate Picture Adjustments with a cal disk sets your tv to be close to rec.709 standards which is then used by any material that you run thru your tv (movies, tv, etc). Source material then being the only factor that you have no control over.