For those of you who are considering a 420, I would highly recommed the manual shift if you are going to be doing any snow-plowing or any other activity that requires the use of a free hand.
We recieved several inches of snow today and I was running circles around the neighbors. My next door neighbor has a 420 electric shift and the neighbor across the street has a Grizzly 700. By the time they both stopped used one hand to lift the plow, then shift gears with that same hand, I was already pushing the next round. I do have the reverse safety switch locked out so I can shift with my foot and raise the plow with my hand all in one motion. However I also have an electric shift 420 and do kind of prefer it on the trails, but for working; the manual is the only way to go if you are needing a free hand.