Lol porchester shop !!
It's upto you but my advice is this, that motherboard will take an fx61**,fx63** upto 1.50v, or an fx81** fx83** to 1.45v.
Your fx6100 might be a great clocker as we've yet to push it, but one thing which will hold you back is the cpu cooling using that tx3 when you start to use over 1.425v. Don't be tempted by the h60 they are no better than a half decent air cooler.
Upto you, your motherboard is fine for the moment overclock what you have. Like people have suggested, let's see what we can get out of clocking with everything you have before spending money and not gaining any fps for it, and that money could then be put towards (I hate to say it) an Intel+motherboard.