Depends on the size of the job. A laser controlled land plane is one end of the spectrum. A 6 - 7 ft. blade is probably more in order, depending on the size of your prime mover. I use a 6' box scraper (with scarifier teeth), a 7' rear blade, and a 1-1/2 yard soilmover (for faster transport of larger quantities of dirt) all behind a 28 pto hp tractor. Specific brands tend to depend on local avaliability athough most have our own biases.