Why is everyone here spouting "get a new CPU, get a new CPU!!!"? Why is that everyone's reaction on this forum?
Too much heat? Get a new CPU!
CPU more than 1 year old? It's too old get a new one!
Honestly.
Your processor is fine. Also, your temperatures are much lower than normal and well within anyone's comfort range. I prefer to keep my CPU below 60*C. If I'm really anal, I try to keep it below 50*C. You are very safe and those temperatures are the very low temperatures I would expect from the hyper 212. Heck, technically you'd be safe past those temperatures as 62*C is the Tcase max, not the TJmax.
You currently have a 2.6GHz quad core processor that is past the TLB bug age. So you have no issues.
The only reason to upgrade would be if you are unhappy with the current performance of your computer. Are you?
If you are having issues with WOW, it could be other components that are more likely holding you back, like your graphics card.
If you do want to upgrade your current CPU, I recommend waiting if you can. In less than a year Bulldozer will be out for desktop and if you want to buy into the new generation, you can. If not, prices of the older phenom II will likely have lowered.