Sadly, a 450 Watt power supply has me wondering why this one
Also, you have surely read this.
"Our tests demonstrate fairly little difference between a $225 LGA 1155 Core i5-2500K and a $1000 LGA 2011 Core i7-3960X, even when three-way graphics card configurations are involved. It turns out that memory bandwidth and PCIe throughput don't hold back the performance of existing Sandy Bridge-based machines. "
So for a gamer, you usually get that or better CPU and then go as far up this next list as you can go.
The site you noted appears to cater to those that want good lucks over performance.