Out of all of the ROMs that I've tried, Ice Cream Sense had the best battery life by far. I've been on Evervolv 2.2.0a2 with the latest Incredikernel beta (with HWA) for 24 hours now and while its not the greatest on battery life, its extremely smooth, fast, and stable. No random reboots as of yet. Definitely recommend it! Just my 2¢...
Update: battery life isn't really all that great with this new Evervolv. I'm still gonna give it a run for a bit and see how it works out. So far, so good... other than the battery.
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