To get there we would have to build a spreadsheet and weigh value and cost of the day then redo every day.
This means that any answer today would be wrong tomorrow. That out of the way, head to Tomshardware to use their best value for the money articles to pick your CPU and GPU.
The rest have little effect on gaming.
Links follow.
http://www.tomshardware.com/reviews/gaming-cpu-review-overclock,3106.html
http://www.tomshardware.com/reviews/gaming-graphics-card-review,3107.html
http://www.tomshardware.com/reviews/ssd-recommendation-benchmark,3269.html
Bob
Hello everyone. I'm trying to put together a decent custom PC on a budget of about 1,000 euros (just under 1,300 dollars or 800 pounds) - exclusively for gaming. I'd greatly appreciate suggestions from folks who know their way around the latest hardware.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic