Grashopper 725d diesel or 729 gas

I am looking an a frontmount grasshopper with a 52 inch deck and pos. and extra 60 inch deck, non powerfold, with 15 cub metal hoppers

I need a mower that can power through tall and short grass, and bag all the time,

will the gas kubota 29 hrs be enough power or should i run the 25 hrs diesel



Fuel savings?

Life Longevity"

Maintanence?



Please help so i dont buy the wrong unit



also, i am planning on get a fuel tank for my business, and am wondering what fuel discounts tend to be for buying in bulk, this will also determine my choice



Diesel in Toledo is 2.90 a gal
gas is 2.40



do the math! what is the better buy???????