right now im using skyraider vanilla 3.0 RC3 rom and i'm loving it. it is only the second rom i have flashed (the first being redemptive r_EVOlution) and i don't see myself flashing any other. Both run fast and smooth. I decided to couple mine with kingxkernal #5/#5 falling up. With it you can overclock the kernal as well as just leave it at stock speeds. It utilizes havs which to my understanding (someone please correct me if im wrong) monitors the cpu speed and adjusts the voltages outputted to save battery life. It is supposed to have good battery life from what i have read, however ive been too busy overclocking to test that part out yet
*Edit This is directly pulled from kingxklick's site, i didn't write these explanations
"So, just as the name implies, this is an HTC Incredible kernel with SVS (Static Voltage Scaling) & HAVS (Hybrid Adaptive Voltage Scaling.) A huge thanks to estes for the havs code and raven for being the first to implement it into the nexus kernel. What this does is provide SUPERIOR BATTERY life with stability to boot. Just flash the .zip in your favorite recovery image. Enjoy and post any bugs with a logcat please."
"Also, a little info on HAVS and AVS:
The purpose of HAVS is to minimize the power used by the CPU by determining
and setting the optimal voltage. At the same time, the maximum voltage by
which HAVS can scale to is fixed to a specified voltage depending on the
CPU frequency in order to prevent scaling to a higher voltage than what is
normally used at a specified voltage. The optimal voltage is actively determined
for each frequency and temperature. HAVS actively adjusts the CPU voltage as the
CPU frequency and temperature changes."