Maritime Storm, I understand about the selection ... and the same is true around here. Dad bought an Ariens 11.5hp/28" path for about $1,300 US 3 years ago ... but with the mild winters we've had the last few years, the exact same machine was going for $999 in some big-box retail stores Feb-March.
The Ariens feels like a really fine machine ... the MTD machines (sold under various labels ... Murray, Troy Bilt, the Tractor & Supply brand (which I forget) ... less so.
JTK is in Buffalo, NY ... which gets heavier snow than we do in the Capital Region 200+ miles farther east ... and seems pretty happy with his machine. I hope you have great luck with yours ... but I'd still caution you to maintain it carefully and inspect it frequently ... especially after hard use. Actually, this is a good practice with just about all OPE equipment as it is common for things shake and vibrate loose. Those little screws, knobs, etc ... can be hard to find and surprisingly expensive to replace.
But like JTK says, I wouldn't worry so much about the engine. Use an oil high in barrier anti-wear additives (ZDDP, moly, boron, etc ...) and change it at least once each year and the motor (a Tecumseh Sno-King?) should outlast the rest of the machine ... even if it was a Honda or Ariens.