Uhm... Just because of the movies... Maybe an A6 would be good for you as well.
The G850 has a very strong CPU, but you'll have to pair it with a discrete video card to watch videos with no problem. The HD2K really sucks for any video oriented feature, to be honest.
I don't have prices on the A6 around, so could you list the options you have, please?
Cheers!
EDIT: Here's a run down on both CPUs, actually: http://www.anandtech.com/show/4524/the-sandy-bridge-pentium-review-pentium-g850-g840-g620-g620t-tested/4