the 2160 is an overclocking beast. You would need to overclock the 2160 a lot more than the 5000 to get to 3.0/3.2, but most have great luck with them. I read something about this a while back and I think the majority claimed the intel chip performed better at these speeds, but paid a greater price in durability, etc. due to the huge overclock to get them there. I can simply change the multiplier from 14 to 15 on my 5000BE to get 3.0 on stock voltages. 3.2/3.4 involves a little more finesse and voltage.
I have no complaints with my 5000. It runs smoothly at 3.0 with no problems. Cannot speak to the 2160 except for their reputation (which is stellar for what they are). I am sure overclocking to that degree is hard on the chip, but for pure performance, I think they have the edge.
Here are a couple of threads/reviews