Depends on what you want to do with your paddling. You've listed creekers, is that what you want? As an instructor, I've fitted a ton of boats. The Ammo by Pyranha is pretty popular. The Habitat is ok but if you go that route you may as well get a Jefe (best creek boat ever!) Personally, I don't like the Jackson creekers very much as they don't track for s*&%. The Remix by Liquid Logic has been getting alot of attention and they just made an expedition model (check out their website). Used boats are a good option as well (check for wear and tear if you buy used). Mostly, just find something that "feels" right, i.e. Is it comfortable? Check out the outfitting and any "flex" in the plastic. For the most part, all companies make quality boats so fit and use are the two bigger questions one should ask him/herself when buying a used/new boat.
Hope this helped