We have several subs who plow with ex PENNDOT trucks. They plow amazingly well. Myself and SALOPEZ are looking for a 4800 to plow with. Or an oshgosh for when the big one hits.
It almost sounds like you need a V plow if your doing long driveways. I would also pick up an old V plow and put a coupler on that too, in case it gets really deep.
I'll either buy a P/A plow for the CASE and install the plumbing, or I'm gonna buy a 50HP 4x4 utility tractor and put a plow on it, because I need a util tractor for york raking and bushogging, too.
My 4800 is for sale for the right price.
It's not everyday you find a 4800 in perfect condition, with only 75,000 mi, 250HP (most are 210), a 7 speed w/ OD (most are 5 speed no O/D) a 12' dump (most have a digger derrick), and Alcoas with 385 floats and 12/22.5 rubber (most are 11/22.5). :drinkup
Oshkosh's are worthless for what you want to do. They're great for plowing an airplane runway, but they can't make any money during the rest of the year because most are useless as a dump truck. I actually use mine exclusively as a dumptruck. It's just like a 4x2 dump, but has that front axle to bail me out of all kinds of BAD situations.