if you have a budget an AM3+ board like the M5A97 r2.0 along with an FX6350 or FX8350 CPU would be quite good for you build, but the FX chips do tend to run quite hot so OC's may not be as good as you would hope for. If you have a bit more money to spend i would definitely recommend going with an Intel based system with an i5.
What do you plan on using this system for? Because both AMD and Intel have stronger points in various different activities e.g Streaming is very good with an FX chip