The best kernel I would recommend is ETaNa Kernel (link in signature), because it's really stable for CM, and you can tweak it a lot with spicas On The Fly pack. Also the battery life is awesome with it. Only, ETaNa Kernel doesn't OC to 1.5Ghz. The HOC version OC's to 1.4Ghz and the LOC version OC's to 1.2Ghz. However the difference between 1.5Ghz and 1.4Ghz isn't noticeable. It doesn't make the phone smoother, it only consumes more battery.
But if you want to OC to 1.5Ghz so badly then I recommend Ironkernel for Gingerbread, you can find it in the dev section.
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