Looking for feedback on powerplants for a z with 60" deck. Options are 1. 25 Hp Kohler Command Pro Twin 2. 25 Hp Kaw. Twin 3. 26 Hp Kohler Command EFI Twin Option 1 & 2 are same price. Option 3 is about $900 more. This is going on a Gravely. I chose Gravely over eXmark because the dealer is 10 min. away and I know them. eXmark dealer is over 1hr. away and dont know them. My use is residential only mowing 11 acers.