System Builder Marathon, Q1 2013: System Value Compared

We've long claimed that the sweet spot for value was somewhere around $800. So, we narrowed this quarter's System Builder Marathon from $600 to $1,000. Which one of our three configurations gives us the most performance for our budget?

http://www.tomshardware.com/reviews/build-a-pc-overclock-benchmark,3441.html#xtor=RSS-182