Definately go with a Strike-Master Auger.
Either the 4-stroke or the ElectraLazer.
Personally, I run the ElectraLazer (electric auger), and I LOVE it. Quiet as anything, and tons of power.
Averaging about 8" of ice this winter, I would get around the 35-40 hole mark per charge.
It also comes with "booster" type cables, to hook directly to ATV/Sled battery to charge (or a spare battery you can bring along), a lighter-plug in adapater to charge in the car, and a regular plug in charger as well.
They have you covered, no matter where you are.