Coolermaster's Nepton 280L is the best performing all-in-one CPU watercooler Frostytech has tested... thus far.
At the business end of the Nepton 280L we find a new generation waterblock / pump head. Near as we can determine, the micro skived copper fins cover somewhat more surface area than previous generations we've tested, which means more copper is exposed to passing coolant and heat transfer is improved. Details on the integral pump are undisclosed, however pump life is pegged at 70,000hrs MTBF.
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips