Since you have a tractor I would recommend a 3pt tiller, Here are my reasons.
1. Cost new is real close to same.
2. No engine to keep up with.
3. Time to till is much faster with 3pt tiller.
4. No extra tires to keep up with.
5. Tractor seat much more comfortable than shaking handle bars.
I just want to point out I have never owned a walk behind so I am just guessing on the handle bars shaking.
*I spent 1200.00 on a Agric 45" 3pt shipped.
