I don't think you can go wrong with any of the choices. For under $1k, the whole lot of these pitbikes seem to be well worth the price. Apollo as a brand are led by the big bike, the '36', which gets good reviews for a $1300 229cc dirtbike (I think I have read in a few places that it is technically a pit bike, but I have no idea what constitutes a pit bike vs. a full-size dirtbike).
I wouldn't count out the Taotao. Superior sells those, too, and like I mentioned, call my friend Alan to see if he can get you a better deal. If not, it seems like Superior has you covered.