I am just about to buy me a new commercial ztr. I am having troube deciding between liquid or air cooled. I can get a scag liq cooled kaw for cheaper than a kohler air cooled. I think I really want the hustler super z but have not checked the price of the liqiud cool. I can also get a liquid cooled bad boy for about the same price as air cooled. this mower will be used for about 2-3 yards a week about 2-3 acres is size. I have read that the liquid cool engines are more fuel efficinent, and last longer, just want to hear your opinions.