Cub Cadet RT65E Tine Tiller
For the biggest gardens or just for bragging rights in your neighborhood, the Cub Cadet RT65E (18") 208cc Dual Rotating Rear Tine Tiller w/ Electric Start can't be beat. This tiller is powered by nearly 7 horses from its 208cc motor, while the rear tine design places weight where the tines are so it will easily break up the hardest soils. It will till a swath 18 inches wide, and will go down to a depth of 7 1/2 inches deep.
The 4 cycle motor needs no oil and gas mix, and this tiller comes with a 3 year warranty. While heavy at 220 pounds, it features an electric starter, so you'll never have to pull a rope, with 1 forward and 1 reverse speed so you can till back and forth to really chop up soil. It’s not an inexpensive tiller, but for larger gardens, this Cub Cadet would be hard to beat.