How do you plan to use it?
Preparing a new garden site, busting sod, would point toward a tractor-mounted or counter-rotating walk-behind tiller...
Preparing to plant an existing garden, and then cultivating the plants in the garden, would point toward a rear-tine walk-behind...
I have both a tractor-mounted and an old Troybilt Pony. The tractor-mounted one gets used twice a year, at most. Once to prep the garden for planting, and once in the fall to turn things under (if the weather, schedule, and soil conditions cooperate, which here in New England if hit or miss). Once the garden is planted, it is simply too big to use in cultivating. In comparison, the old Troybilt gets used at least a half-dozen times, or more, cultivating the garden once planted...
IMO, if you get a Troybilt, spend the money to get at least a Pony or Horse models, or don't bother... either one would be a "one-time" purchase that'll likely outlast you, with maintenance.
I just put new tines, shaft seals, and axle seals on my 20 year old Pony last spring -- the first major expenditure of $$ on it in 20 years. For the first half of its life, it was the only tiller I owned, so it did the additional tasks I now use the tractor-mounted tiller for...