I demoed two Toro Z500 series mowers yesterday, one was the entry level Z500 (model 74292) with the 7 GA 60 inch deck and 27 hp Kohler, the other was a Z580 (Diesel) with the Turbo Force 60 inch deck. My main reason for demoing the two was to decide if I should spend the extra money for the Turbo Force deck over the 7 GA deck. There is about $1000 difference in price. I know there are some other upgrades as well with the Turbo Force deck model 74283, like the wheel motors and speed. Both were demoed on the same lawn and the cut was good with both. The TF deck dispersed grass much further (2.5-3 deck widths) compared to the 7GA (1.5-2 deck widths). Anyone else made this decision? Any thoughts/suggestions?