Zalman CNPS9700 LED CPU Cooler Review

I decided to over-clock my new Q9450 Core 2 Quad processor from its native 2.6 GHZ to 3.0 GHZ and the result of running prime95 to check my temperature scared the pants off me. With the stock cooler my CPU went up to an average of 74 degrees Celsius using Speedfan, CoreTemp, and RealTemp. I understand that no program I use will cause my CPU to get to that temperature but I would rather keep it cooler so I purchased a Zalman UltraQuite CNPS9700 LED CPU cooler. The immediate result after running prime95 for 2 minutes  was around 65 degrees Celsius. Currently at idle speeds I am around 51 degrees Celsius. Although I would like to be much cooler, this is below the threshold of 70 degrees so I am happy.

Assuming I applied the thermal compound correctly, I guess this is as low as I am going to get without going to water cooling. I would love to do water cooling but out of the two systems I have owned, the both sprung a leak and one resulted in the total destruction of a motherboard.

A couple of cool things about this CPU cooler is it comes with a variable speed control switch and a blue led in the fan. Also included is thermal compound which comes with a "nail polish like" bottle with a brush applicator making it pretty hard to screw up applying the compound.

The temperatures I gave were an average of all 4 cores and for some reason, the first core was hotter by roughly 10 degrees than the rest always. I do have a case airflow issue and am upgrading the case to something with better circulation. If anyone has any ideas as to cooling my computer down more, please let have your suggestions. Also note, Zalman says it may take about 200 operating hours before best cooling is achieved.