KIOTI CK3510se HST Open Station w/FEL, RK24 HST w/FEL & Backhoe, DEAD-NH TC33D HST
60 inch would be my suggestion. I have run 2 different KK 72" finish mowers on my NH TC33D hydrostatic and the tractor continually ran hot. I can run a 72 inch flail mower with no issues of running warm. Mostly flat terrain mowing grass and pastures in Mid range.