Whats your budget?
Some good cheaper options,
Gigabyte 990FXA UD3
Asus M5A99XEvo r2.0
Asus M5A99FX Pro r2.0
Asrock 990FX Extreme4
Asrock 990FX Extreme9http://www.tomshardware.com/reviews/990fx-motherboard-review-amd-fx,3464-20.html
For 5ghz you'd need a board with at least a 8+2 power phase design.
Sabertooth R2.0, 990FXA ud7 or CHV Formula are the best boards for max overclocking (5Ghz+)