No.. the only FX CPU worth considering is the 8120. (Senses a feeling of Deja vu), and thats only provided you overclock it. The FX CPUs are not true quads, hexa and octa cores. They "pretend" to have twice the cores they actually have. Meaning the FX-6100 is a tri-core for all intents and purposes, the Phenom IIs are true quads.
The FX-8120 is a quad core that "pretends" to have 8 cores. Stock to stock they aren't very impressive, but are actually as good as i5s for gaming if you overclock them. Yes, I know people can scream bloody murder in these forums about it... Fact is.. its been benched. http://www.overclock.net/t/1210060/fx8120-vs-2500k-benchmark-results