Max purchasable: 10? Probably not a good idea to have too many in one place. Lag, you know.
Options: Any Race/Gender Combo
Stances: Attack, Block, Self Cast, Target Cast, Touch Cast, Sneak, Victory Pose, Finisher (maybe the generic one used on NPCs), etc.
Customization: Any weapon or armor/clothing you can wear, they can wear.
Portability: Could use basic Radiant AI Packages or basic scripting to move.
What do you guys think? Is it finally time for us to have a better way to display our armor instead of the shoddy game world models that don't look real (at least as far as clothing and Armor)? Would you like to be able to put a model of a crouching Bosmer assassin with the Dark Brotherhood armor, Sufferthorn, and the Blade of Woe equipped? What about organizing two models to make it look like a battle between the Mighty Arch Mage and the Fearsome Mannimarco? I think so.