Closed loop water coolers aren't really worth it. When you look at the test done by reliable sites it turns out that they are no better than high-end air cooling. Closed loop water coolers are not as good as custom water loops. If you are going to spend 80 to 100 plus dollars on a closed loope water cooler you might as well just get a Noctua D14 in push pull configuration.
The CoolerMaster Hyper 212 EVO is stupid cheap with the highest by far cooling per dollar ratio. However, there are better coolers out there, but they will cost you. Perhaps the best cooling at near silence is the Noctua NH-D14. Much higher quality fans and parts than the EVO and cools better at lower noise, of course costs about 3X.
For me personally, I was set to buy the EVO, but if you read some one-star reviews on it, you can see a lot of dead fans. It just isn't of the best quality, but 30 bucks? Excellent buy. I think I am going to get a better cooler, but to beat the EVO you will need to spend at least 2X.