Simplicity and Ferris go down the same assembly line in upstate NY.

A great value is the Simplicity Citation XT or Ferris IS800X - Front and rear suspension, commercial transmissions comes in 52" and 61" decks.
They are also less money than most in it's category.
Keep in mind when doing your research that the transmission is the heart of the machine especially if you have hills.

The key thing about the suspension is that it isolates the entire machine and operator from the bumps. Suspension seats only isolate the operator from the bumps.

www.simplicitymfg.com
www.ferrisindustires.com