From Worst to Best
Murray
AYP/Craftsman
MTD/Cub Cadet/White/Yard Man/Yard Machine/TroyBilt
Toro
Honda Push Mowers
John Deere @ Home Depot
WheelHorse
Kubota
JohnDeere @ Jd Dealer
I know I left many many out, but these are the mainstreamers.
Murray is the worst..absolute junk. Bad designs, bad quality...just......yuck!
Ayp is slightly better, still low quality, a little better desgin, quality i still low.
MTD is decent quality, but the Transmissions, and Vari-drive is junk.
Toro is okay, they have gone down recently, but certainly a nice residential/semi commercial mower. Not including ZTR mowers.
Honda Push mowers are nice mowers and all, but you have to spend so much for so little, especially the models with plastic decks..
The JD's sold @ home Depot are okay quality, decent designs, but poorly executed details.
The WheelHorse 315-8 Which is the only "wheelhorse" built currently, is a fine peice of equipment. Timless design, well executed, good attention to detail, good amount of overbuild.
Kubota is excellent. Well built, Heavy Duty, but way overpriced for the product. If you have to have a diesel, get a Kubota.
John Deere's sold @ a dealer, not includign the Lawn Mower 100 series, and X300 series, are some of the best built machines available. A little pricey, but worth every penny, especially the EFI models.