so i know there pretty similar cards, and that physx is supposed to be great, but because both types of cards are almost identical in price now what is the better choice? i'm debating between an msi 660ti with triple overvoltage, or an saphire radeon 7950 oc addition, is the ability to overclock that much better on the msi 660ti, or should i go with the card with the slight performance edge out of the package that does not have overvoltage? i just want to be able to play metro 2033, skyrim, and other graphically intense games on as high a settings as possible. my tv that i'll use as a monitor is 1920 - 1080 and it's a 40 inch lcd. thanks all!