We had a very large 2 stage machine, 12hp 30" some width, power steering, the whole deal.. It was great when we lived out in the country and had a big big long driveway but turned out to be too big here in town. So I gave it to my sister out in the country and on the recommendation of the Toro dealer here in town I bought their smallest single stage model called the Powerlite. The one I got has a two stroke engine but now they're all 4 stroke engines. I was very hesitant at first because we still have a fairly big double width driveway and this thing is only about 18" wide, 12 inches high and so lightweight you can pick it up and hang it on the wall.
Honest to god Larry, it's absolutely amazing. I can finish the driveway in record time. The neighbors have tried it as well and think it's alot better than their 2 stage machines as well.
It can take a little longer on that awful end of driveway snow but not if you get at it right away.
I highly recommend it
Here's a youtube somebody made.. basically the same model I have.