After a ton of research, in 2009 I purchased a Kubota ZD326. This one har a 60” commercial deck & is a three cylinder diesel.
This time of year I’m cutting about 6 acres once a week. Mower has plenty of power & more grease fittings than you care to mention. This 326 will mow faster than my old butt can stand. This mower has been a damn good one and has been kept out of the weather. There are too many sensors to get wet & cause problems.