1. Swifteh Storm - 75USD - this is the top performing waterblock currently in retail. It is better suited to more powerful pumps, but still performs well with low flow/power pumps. Apparently the Storm is no longer dsicontinued, but it seems there are now large price hikes, and somewhat limited availability.
Due to repeated incidents in which the storm is improperly installed, please be advised that the proper way to install the tubing on the storm is as follows: inlet in the center and outlet towards the outer edge.
2. Swiftech MCW6002/6000 - 45USD - for low power/flow pumps these waterblocks are top performers.. with moderate restriction these waterblocks matched with low power pumps will net decent flow to allow usage of a second waterblock
3. Cooltechnica MP-05 - 50-65USD - a high restriction waterblock with excelent performance. while it does not outperform the Storm per pump power, its lower pricetag makes it an attractive choice.
4. Danger Den TDX - 52USD - while a good waterblock, it is not an optimum choice of waterblock for a high or low power pump system. I list it merely for completeness of the guide.
5. Danger Den RBX - 52USD - Again, a good waterblock, but not worth considering unless you have some desire for a 3 barb waterblock.
6. WhiteWater LE (all coper version) - 44USD - Origionaly designed by Cathar, this 3 barb waterblock performs well, but uses a dated design and is not optimal for maximum performance.
7. Swiftech Apogee - 45USD - The newest block from Swiftech that takes a step backwards in performance. It is essentially a MCW5000 respun with a new manufacturing process (cheaper), and new delrin top. While Swiftech says its the best thing since sliced bread and Television, please try to avoid it as EVERY other block on this list performs superior to the Apogee