DHD roms (2g/3g, energy)

[walawalabinbon]

Hello everybody, I was wondering if anyone know of any ROM that allows to switch from 2g to 3g (or viceversa) automatically to some apps, like juicedefender, or extended controls. I think Cyanogenmod allows it, but I heard it doesn't provide a good energy administration.

And in the other hand, as I talked about energy administration, what ROM do you think works better for battery in DHD?

Thank you guys!