Our company cuts a lot of municipal parks, sports fields, large rough areas and hills etc. We currently run the the kubota Zd331 with 72" mulch mowers (as per the city's request) Here are some of the problems we experienced with the Zd331 which I have noticed other LO's have had same problems. Overheating issues, muffler manifolds fallen off, rear seal bolts coming loose and damaged causing excessive rear seal oil leakage, motor mounts breaking off, parts are expensive and take awhile to get. These machines each have apprx 3200 hrs on them or about 650 hrs per season. IMO they are not 5000 hr machines however I would still consider one if Kubota has addressed some of these problems. Please do not recommend other manufactures as the ones I have listed have good dealerships in my area. Thank you for your opinions!