I have a 60" super z and a 48" w/b. It takes about 10 minutes on the ztr to mow my lawn and 13 on the belt drive w/b with a sulky. It seems like unless its a big open area a 60" hydro w/b could cut more grass faster. Can you turn like a ferris 61" hydro dual drive or hustler 54" w/b or 60" exmark turf tracer around on a dime like you can a belt drive w/b w/o tearing up the grass. With my 48" I can just slow way down/almost stop the inside wheel and keep the outside still going full speed. What do other people think? I might be looking at adding another w/b to the fleet next year.