The best am3+ board is only $220 thats the crosshair V and a great overclockers board, can get a asus sabertooth, great quality, a asrock fatality which is good for overclocking, a msi gd80, gigabyte dont remember model but def 990fx if ur budget is $100 to $200. I would go asus as i prefer them, there quality is great, but heard good things from almost every top end 990fx board. Everyone beside the crosshair V is under $200
At $100 and a good overclocker is a gigabyte 970 ud3, but for ur budget id at least go 990fx. If the board is good for overclocking, it'll usually be good quality, as boards that dont overclock so well tend to have less quality components, etc. If quality is ur issue go sabertooth, has a 5year warranty, the TUF Components, but id have to say any of the boards around $150+ will have great quality