860K is the best it gets for discrete CPUs on the FM2+ platform.
A10-7850K is the flagship APU option.
Both are quad core Steamroller CPUs that offer a few minor improvements over the 760K.
The biggest performance advantage is in workloads that bottleneck on the instruction decoders of the 760K. The 760K has 2 instruction decoders, while the 860K has 4. This improves MP performance scaling quite a bit in some workloads. Where we often see ~1.75X performance scaling from 1 to 2 threads on a piledriver module, steamroller scales as well as 1.95X.