But don't get a smaller "Bronco" size rear time. They are too small to be heavy enough to work. The slightest tough spot and the whole tiller wants to jump. I have both kinds and only get the Troybuilt Bronco out for reall light jobs. I use the old heavy MTD for spring tilling as it just does better. If it is big enough to need an 8 horse motor it will be heavy enough to do a good job.
Since Troybuilt went cheap I don't think there are any that are lots better than the others. As little as one gets used it will outlast you no matter what kind you get.