Up here in Maine you only see two stage blowers.
I have a Sears 1993 vintage, with 10HP tecumseh two stage 29" wide.
People ask me all the time, what kind of blower to get, I tell them get the two stage and most HP you can get. I would probably prefer a slightly narrower unit, maybe 26" wide but other than that, with a signle stage you will throw it in the trash when you get wet heavy snow.
My sears has been great, sees about 60-100 hrs a year. I have repalced a few shear pins, blets and 1 carb and that is it in 18 years of service.
If I repalced it, I would get an Ariens or Simplicity hands down.