I just run mine in m range and use the high/low range most of the time 99%.......... I never take the backhoe off...
I can't tell if Dakota Joe ordered a machine, I also don't quite understand why anybody cares about the differences in road speed.
On the OP topic of brush hogging, and for the _tiny_ incremental cost compared to an L47, I'll plug the MX5400. Mine hauls a 6 foot medium duty landpride cutter easily through a full year's field growth (full of saplings and weeds) without any issues. I'm guessing an L47 is fine too, but I'm really happy I spent the extra $1-2k (IIRC) on the MX5400.