No single best board out there. Best you can do is:
First, set a budget.
Second, if you have a brand preference, discriminate by that initially.
Third, decide on board features you cannot do without and what features you feel are superfluous.
That process should get you down to just a very few to pick from.
Then it's up to color(if that's important), etc.
I bought this board with a 2500K simply because it had a mix of features I was looking for, was a decent color layout, and I bought it at MicroCenter with the cpu, so it ended up costing $100 + tax out the door....before the $15 MIR.
http://www.newegg.com/Product/Produc...82E16813128498
Not the "best" board out there, but good enough, looks nice and OC's well enough. Should last until IB comes out next year....then the wife gets it.