Those are all good bows. If they meet your needs, feel comfortable and style of shooting, you won't go wrong with any of them.
For some people (me included) the Mathews grips are too wide. I had to replace mine.
If I were making a choice between the bows that you listed, I would look at the pro shop that you are buying from. Do you have a good relationship with him? Will he give you good service after the sale? Can he help you with your shooting?
Some places are Pro Shops, others are just archery shops. :cry:
Another factor to consider is the smoothness of a bow. Moving up from a Nova, any of the bows that you listed will feel very sooth. However, you might also try the Bowtech Justice. It's about the same ATA as the Outback and Mighty Mite, but very smooth with little hand shock.
Good luck, let us know which one you pick.
Allen