Vector adaptive is usually thought to be the best, but it's disabled in the 5450 if ESVP (Enforced Smooth Video Playback) is enabled, as the card doesn't have sufficient horsepower to run both at the same time.As far as I'm aware (i'm sure someone will be along to correct) it comes down to the de-interlacing power of the card. Might be worth checking in catalyst control centre what the best your card can support is (I think motion adaptive is the best from memory)