Well you like the Honda commercial engines, so you can
go for a honda 2 stage snowblower. They all seem to have
gx series motors on them.
An Ariens, Deere etc might do you just as well without
costing twice as much a new Honda.
Remember they are great machines, but you really pay for it!
If you are working on a gravel driveway, make sure NOT to
point that snow at anything important (cars, house etc)
Rocks can and WILL get in that snow mix. Only thing I would
say with any two stage unit is to make sure you jack those
skids out on the auger a little more than normal. That might help
you with shooting too many rocks out.
If you want throwing power, make sure to get a decent horsepower
motor. Something in the 8hp range is a good start. Smaller ones are
ok, but may not have the throwing power you desire.
Once you get that blower in, make sure to buy an extra few sets of
shear pins. Nothing like breaking one of those and not having any
extras. A cotter pin or screw/nut combo can be used temporarily,
but if you get something jammed in that auger, say bye bye to that