Those are not good for editing. I would say a 560Ti, which is much better, or even a 560 Ti 448, if you're doing HD video editing. If they're out of your price-range wait a bit. Sometimes, they drop to ~$150.
Notice that the GTX560 is also sold by MSI and cheaper than the nVidea card.
Is MSI a reputable brand, good thing with nVidea & ASUS is being able to get support, driver updates etc.
I have never come across MSI before.