For a diesel 72" Z - I have heard alot of good about the J.D. 997
For open area mowing and leaf cleanups with my trac vac system, my front mount J.D. f1445. - also 4 wheel drive.
They both have the yanmar 31hp diesel - excellent on fuel. It probably uses almost have the fuel of my 930A Z.
13' Chevy 2500 Duramax
12' JD 657 Quik Trak
11' JD 930A Z
05' JD F1445 Diesel
08' Haulmax 24' Enclosed Trailer
11' JD JS 26 W.B.
12' BOSS 9.2 V-XT plow
Stihl hand held eq.
10' L.W. 13hp blower
13' Permagreen Triumph
WI certified pesticide applicator