get the Swiftech H220 or CM Eisberg 240L prestige. They topped the charts in the review below which looked at the Swiftech (1st place), Thermaltake (4th place), Coolermaster (2nd place) and Corsair (3rd place)units
But with the Coolermaster Eisberg 240L Prestige available for just $109, it's a easy decision:
1. Same price as 100i
2. Better thermally than 100i
3. Less than half as loud as 100I
4. Loop can be opened to cool other components, i.e. MoBo moffsets