as in the title, im looking at getting a gtx 770, im torn between the msi lightning 2gb or a palit jetscream 4gb, i use 1 monitor at 1920 x 1080 but i do play in 3d quite a bit, is the extra 2gb vram going to help? i need the card to last as long as possible as im out of money for pc for at least 2 years....many thanks!