Hi,

I have a client that has multiple offices and they want to set up a video conference system.
Must be good quality sound and video
Private chat and speak to everyone in room
Video quality should be "OK"
ability to share documents
Must look professional as they will invite clients to conferences

Does anyone know of anything or can recommend something they have used ?

Yes,

I have got one possible solution for you - the video conferencing products of Tandberg (http://www.tandberg.net/).
As much as I have read your post, I am quite sure their video conferencing systems would suit your client's demands.

Hope my advice was of help :)