Could be better, but it is a start at least.
I wouldn't use it myself and I wouldn't suggest others use it, there are better guides for getting the most bang for your buck.
This website hosts a contest every month for how to best spend $500, $1000, and $2000.
That contest tracks the prices of everything on a month to month basis.
Other websites have links that show the best price for every video card currently on the market and stuff like that.
Those are the things I use to determine value parts. If you are like me you are willing to spend a little more if you are going to get a whole lot more as a result.
Such lists like these are where you go for things like that
http://www.videocardbenchmark.net/high_end_gpus.html