What method are you using to measure the temperatures?
Oh, and forget about the Aquarius unit. It sucks for an overclocked rig. I tested it out on a Barton core 2500+ overclocked to 2205 and the results were not that good. Quiet, but not really that cool.
Here is the review of the Aquarius 3 cooler, which is supposed to be better than the v2 model you mentioned.