I've got a phenom 2 965 running stock (not the BE) in one PC, and an i5 2500 in another. Both machines handle everything ok as far as games go, but the phenom 2 takes a lot longer to build kernels or compile anything big, and, the mobo I have uses DDR2 instead of DDR3. It runs things OK, but, even a top end AM3 chip, overclocked is going to struggle compared to any Haswell or newwer i5.
I'd say when you upgrade, go for an i5 4xxx or better (not sure if skylake will be worth waiting for or not, but the wait should not be too long.)
Get better performance overall, and better performance per watt.
I say this even as I still own some shares of AMD stock (should have sold it when it was up to $4 and would have made a tidy profit, now, I'm down about $800 or so, willing to chance losing it all in case they come up with something, but I have been pretty disappointed as of late)