Don't get ANY of those, bulldozer was possibly the worst CPU series that AMD has ever made. FX 4300 or FX 6300 is the only thing I can recommend from AMD with your budget. FX 4300 is priced at 130$ and FX 6300 at 140$ which has the best value. Any of those you've choosen are terrible, just terrible. It wouldn't make any sense buying them.
Not true. The 6100 is a good value at around $110. It can be had cheap, offers great performance for the money, and unlocked multiplier. It outperforms just about anything under $125.
As a wise man said, no bad cpu's, only bad prices. And the 6100 is good at $110.