As a Small lawn care company , we mow 60 acres each week. We Use walker mowers and have had no problems over the last 8 years with them . Through out the year , we do a large amount of rough cut mowing .This is done with a 60 inch flail mower and a 60 inch bush hog . Both mowers are powered by a 25 hp Kioti tractor.
We have two acres that we mow with a Toro Z400 48" mower and and additional eight acres that we mow with a Kioti 30 hp tractor pulling Caroni six foot finish mower (low grass) or a five foot flail mower (high grass). It's spring in Vermont, so we're mowing twice a week!
We mow 20+ acres using a JD GT235 (wife) and Kubota ZD323 (me). I did use my JD 970 (turf tires) with a finishing mower but never liked the results compared to other mowers. Bought my 323 after discussions on TractorByNet and really like it. Looking forward to gaining knowlege about weed control (including Bermuda grass which my wife hates) on this forum.