I think you really need to decide exactly you are going to till and buy a tiller for THAT purpose.
I've been around the Woods and the Bushhog and they are light to medium duty tillers.
I've never had anything to do with the Rhino but if it's similar money, I'm betting it's of similar build quality.
SR
Something else to consider are they available, if you’re buying new? I wasn’t able to get my first choice (this was last year), may not be an issue now.
Mike