Blue,
Both Sweet tractors and CCI offer great products and are great guys to deal with. You can save some $$ going with either of them. I have a "First Choice" tiller from Sweet Tractor and it was smooth transaction. Many folks here have worked with CCI and have similar results. It is just another option if you are conferrable with your local dealer, great too, CCI and Ken just offer another quality option to you.
How often will you use the tiller, commercial or home use, etc? Most tillers for home use will last a very long time. If you are using it everyday then you may want to spend more $$ for a gear driven commercial model. Give us more detail on the planned use and TBN folks can help./forums/images/graemlins/grin.gif