I have never owned a Walker. Have three grasshoppers. One is an 02 721d with 2800 hrs. Still used daily. Have an 05 722d with 2000 hrs used daily. They last a real long time when cared for. Have been running grasshoppers for 18 years. I wouldnt own anything else.
The Walker steering handles look awkward being between your legs but I may be totally wrong.