I have owned a 30 inch Sears Craftsman (also sold as AYP/Poulan/Husqvarna) 2 stage with a Briggs & Stratton 1650 Max Snowseries motor (342cc / 16.5 ft lbs torque) since 2008. Rule of thumb, for a 2 stage snow blower, you want an engine with 1/2 ft lb torque per inch of width.
Our driveway was 200 feet long and 10 feet wide for most of the length, with a 2 car length spur and widening out to 16 feet wide for 2 car lengths near the garage. Had no problems dealing with the usual Newfoundland snow fall and the snow plow created bank across the end of the driveway.
It can sit out in the freezing weather for days ... set the choke, 2 pumps on the primer, and it starts first pull.
Only had 2 issues with it. Got a bad batch of fuel with water in it a month ago that required disassembling the carburetor and priming pump, and removing the tank to completely dry it out. The second issue was water getting into the cables and freezing. If it was kept in the garage, then there was no problem, but if it had to be left outside, then it'd take some time for the engine warmth to thaw the cables. Broke a cable last week trying to move the chute too soon. Have a clamp on cable luber on order, so that problem should be gone in a week or so when the luber arrives.