Movie mode may be the easiest on the TV.
If you want it to be easier on the TV turn the contrast down.
The higher contrast is, the more likely you'll get some image retention. Image retention isn't that big a deal, burn it can happen as well, but then only when you notice image retention and just keep going.
If you bought the thing to play Halo 4 on, you bought the wrong TV, go get an LCD.
CalMAN Lead Developer