I also used to mow with a pull behind rough cut on my L-Series. My front field had a lot of brush and weeds but the more I mowed it the more the weeds were replaced by grass. I bought a Zero Turn and what used to take me a whole weekend now only takes me 4 hours, and I'm not scalping the field all the time (my field has lots of hills and is very uneven). The zero turn does much better on the hills too. On hills that I was grabbing the handles to hold onto my seat with the tractor, I feel much more confident with the ZTR because of the lower center of gravity.