I have an old Walker zero turn. Excellent piece of equipment.
An American company that makes mowers in America, and I do not believe you could find a better built or engineered mower.

They might be a little more boutique than some of the other brands that have been mentioned here, but I would wager that they are better built with better parts and better design.

Here's their website - WalkerMowers.com | Commercial Riding Lawn Mowers | Out Front Mowing

Check out the 'about us' tab on their website too, very cool read, and a great American success story.

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On some nights I still believe that a car with the fuel gauge on empty can run about fifty more miles if you have the right music very loud on the radio. - HST

1983 300SD - 305000
1984 Toyota Landcruiser - 190000
1994 GMC Jimmy - 203000

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