To go completely overboard on the mowing of my 1.25 acres, I have boiled down my choices to between a Gravely ZT HD 48 w/23 hp Kawasaki FR691, at $4639 vs. Ferris 400S w/21.5hp Kawasaki FR651, at $4299. Both are 48" 3 blade fabricated decks. The Gravely is $1056 off MSRP, the Ferris is $700 off...