I know this probably is a dumb question but I have the opportunity to upgrade my Z-Force Cub Cadet with a 50" deck to a 2006 Exmark lazer Z HP with a 23 hp kawi and a 56" deck, and 305 hours. Think I will notice a big difference or that it will be worth the $4,000 to trade??? I have about 6 big commercial properties (over 2 acres of grass each) and about 25 residential properties. I have a Cub 44" Z-force that I will keep along with my walk behind for the residential's but think the Exmark would help the operation. I need someone to either talk me into it or out of it. Thanks!