Purchasing a Rototiller
I have a 40' x 100' garden that I need to till. It is excellent soil with virtually no rocks. My parents have been working this garden for the last 50 years. Unfortunately, they are now too old to continue - it is now my job (a job much to my surprise I enjoy doing). The last two years, I prepared the soil for planting with a mini tiller. This year, I want to use a more apprpriate tool. I've been considering new vs used, and rear tine vs front tine. Currently, Sears has a 9 torque rated front tine tiller on sale for $340, and a 8.25 torque rated rear tine tiller on sale for $570. I've also seen a used Ariens 9HP rear tine tiller selling for $300.
Has anyone had any experience with the Craftsman (Sears) units?
For my garden, would I be better off with the rear tine tiller or would I do equally well with the front tine unit?
Any thoughts about purchasing the old Ariens instead of a new Craftsman?
In advance, thanks for your help.