New
#21
Seriously, you are going to have to read these sites yourself and determine your best course of action.
2 real choices that I can see
#1). Buy the video card you want. If you find that you cannot quite get everything out of it that you had hoped for, down the road upgrade the CPU and the motherboard
#2). Find a card that costs less money that you are going to spend on the card you are looking it. This way, if the rest of your system isn't up to par, then you won't be out as much on the video card.
At the end of the day, you are going to substantially increase your video performance. Most of us here seem to think you won't be held back by your CPU. However, it's your call...sometimes you gotta take a risk for the reward.
And so what, if the benchmarks you saw were for your resolution. 20-30FPS is reasonable enough to play a game. If you want more than this...just knock down the quality just a bit.