so I was looking around on newegg and was suprised to see that 2gb of memory costs about the same it did for 1gb last year when I built my system. I was wondering what sort of performance increase I would see in games such as oblivion, quake 4, and other next gen games. these games are playable on my system with high settings; would It worth the upgrade? or should i just upgrade to 2gb for half the price?