Here is another step in the analyis. I used Anandtech data (which agreed with this thread) and added a cost per frame column.
The x1900xt is clearly the best bang for the at costing $3.34 per frame. While the X1950XTX is the worst bang for the buck at a cost $5.03 (the highest)
I have this all nice and neat in an Excel file if anybody is interested. It's too bad we can't format these posts better.
Again, remember these are the least expensive cards in each card category.
I like beer
Battlefield 2 1600 X 1200 - 4X AA
Video Card- Cost- Frame Rate- Cost per frame
7950GX2 $494 103.6 $4.77
X1950XTX $419 83.3 $5.03
X1900XTX $354 80.7 $4.39
X1900XT 512 $346 76.4 $4.53
7900GTX $373 75.6 $4.93
X1900XT 256 $234 70 $3.34
7950GT $259 65.5 $3.95
7900GT $229 52.7 $4.35
X1900GT $199 51 $3.90
7900GS $189 48.2 $3.92