We got a pretty good deal on a John Deere 700J from a local rental company. If nothing else - they sure kept it clean. We like the hydrostatic drive. It makes hitting and pushing out Mesquite “nuts” a lot easier.
The JD has it’s hydrostatic and hydraulic system tanks separate too, so no contamination issues.
Go for the 6 way blade too. It’s a nice feature. Especially for clearing bar ditches.
Go with the widest tracks available. Keeps the ground pressures (PSI) as low as possible. Stay away from quarry/loader tracks (dry hard surface only).

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1980 300D - Veggie Burner !