So, do you think that it's ok playing Deus Ex at 60C?
I'm thinking of getting a Cooloer Master Hyper 212 for it just so it won't always be so hot, do you think that would help with the temps?
An aftermarket cooler is almost always better than a stock one, however, yes 60C is fine, I believe. I would be inclined to try to do another application of thermal compound on the stock HSF before I ran out and bought a new cooler. Its possible that you had air bubbles in it when you installed it, or something.
The only real reason to buy an aftermarket cooler other than overclocking (which you cant do with a 2120) would be if you found the stock fan to be too loud. I don't know about i3s, but the stock HSF that came with my Phenom II was pretty loud under load by my standards (and I'm the kinda guy who has a box fan in my room in the dead of winter for the ambient noise)