Hello,
It's hard to label one mower as best, depending on what you're trying to do with it (mulch, bag, vacuum leaves or just cut). Snappers do have the best vacuum action. Somewhat of a downside to Snappers, was they are heavy, something you're not going to lift it, to put in your trunk to mow grandma's yard.
Years ago, the grass cutting services for small residential lawns used Lawn-Boys. Being light, dependable and rugged. It wasn't uncommon to see their trailer with 4 or 5 of them on it to do the back lawn (to get through a Cyclone fence gate) and a larger walk behind to do the fronts.
With 2 strokes now a thing of the past, I'd have to give the nod to Honda's, especially ones with the GXV engine. Their twin blade setup does leave a nice finish cut. Remember when your shaving razor had one blade, now how many does it have?
For the worst, it would be best to talk to the guys who own repair shops (not a dealer as the dealer will say their brand is the best,,,lol), they'll tell you which brands come in for service most often. This is true for appliances as well.
Regards
Jeff