Last year I got to use both the Ion and the K-drill with and without the plate, and I liked both but I would give the nod to the K-Drill with plate. Main reason is the K-Drill is a little lighter and a little less bulky, with the plate make sure you get the gearbox one as it seems to take a little shock out and then the plate handle can be set on the ice keeping off the ice. For the drill if your buying new try to get the bigger torque Milwaukee, not sure which number it is, as that did seem to cut even better.
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Both k drill and ion were 8in models