I'm in the market to replace a mower and am having a tough time deciding which mower to go with. I know Hustler makes Big Dog, so I'm not concerned with quality. They look identical side by side other than color and branding. I was trying to stay away from Kwai this time, but that's the only option for the Big Dog. Hustler has the choice of vanguard or kohler, but the cost is about $1500 more. Is the Kwai fx850 (27 hp) a solid engine. Thanks for the input in advance.