Which brand has the best lawn mowers?

One Lawn ... I agree with you 100% "STIHL brand is number one" over all because of the dealerships and the service provides, it's a German company and they do believe in the greatest service ever. Their Lawnmowers are Not in sequence with USA standards because they are just getting into that sector of the business. Now have you ever driven or even sat down on a Grasshopper unit, if you haven't do so you'll be amazed and impressed. they have now the Stand On units with 52" and 61" decks and are pure power, the whole entire engine/Deck and transmission moves up and down plus best of all is USA Made. Stihl is great for Chainsaws and all the rest you mentioned and I've work on all, but Not the lawnmower line, so try to demo a Grasshopper and you will see. Attached is a 52" deck with a Kawasaki 27 hp engine, 2 gas tanks and the stand on platform is wider and can be lowered or raise to fit your height for better comfort and avoid exhaustion while working, they also have Diesel units, gasoline an Zero Turns. Hope you appreciate my experience ... Regards