Mainly I'm looking for human player models...animated...and realistic (My meaning of 'realistic': No comic book characters with foot-thick arms and a chest that's as wide as they are tall).
OrcSlayer,
Your requirement will not provide you flexibility. You should specify the type of animation. I would recommend a animated model using bones. You could end up with MD2 model and MD2 is not very flexible.
With a animated model using bones, the geometry of a character can be modified fairly easily. Thus, foot-thick arms can be reduced to norm. Texturing and Animation can be modified and added with relative ease. You can apply 'motion captured' animations, physics, inverse kinetics to the bones for the real-feel.
You can also accessorize your models by attaching Clothing and Armor at the joints or geometry. This will allow you get more for your money if the license restrictions are good.