I have watched numerous fisherman use the 40V Strikemaster and that unit is an animal. It effortlessly cuts through anything. One unit that I have yet to see on the ice is that new Ion. The manufacturer raves about its ice chewing ability over all others.
I have that 1200 inch-pound Milwaukee FUEL, mated with a 7″ RAZR auger. This combination works very well and requires little effort to break through the bottom of the ice. Unless something breaks, they will bury me with it.