Thanks Erikari,
Can't believe i missed this!
2500px is for a large object the character interacts with which is consequently a child bone in the character skeleton.
All characters will be a max of 1000px high.
Can you foresee any problems with this?
As I say the game will be heavily animated and will feature some very close up shots where we therefore need the characters/skeletons to be such a high resolution to maintain their quality.