Over the years, I've had three snowblowers that were up to the task, but some had weaknesses. The first was a John Deere that was made by Mckee that came with a used tractor that I bought, but it was too big for the tractor. I replaced it with an AgroTrend (now owned by Art's Way) by driving up to Canada and saved $ a lot. After purchasing a new tractor, now that was too narrow to cover the tires on the new tractor and I was back to looking for a larger blower, fortunately I found a nice Lucknow at an auction for a reasonable price.
Looking back, the John Deere was the worst of the bunch, it only had a 3 blade fan with a large gap between the fan tip and the blower housing, and the auger was a full blade instead of just a skeleton like most newer units The full blade auger was more prone to plugging in wet snow which was a pain. The AgroTrend was an all around good blower with a 4 blade fan and tight clearance between the fan tip and housings with a skeleton auger. I would buy one again in an instant. The Lucknow is a heavy duty well built unit that also has a four blade fan with tight clearances and a skeleton auger and is on par or better than the AgroTrend.
In summary when looking for a snowblower, 4 blades is better than 3, blade clearance should be 1/16 to 1/8", more than that starts to suck HP and reduce the distance that the snow is thrown, and it seems that you want a blower made somewhere that gets a lot of snow(Canada).