We currently have one 2003 DC and a 2003 exchange server. I have ordered the hardware for another server to be used as a Data Server (File Server - Not Database Server). Both of the existing servers are running 32bit Windows 2003 Server. I will be moving approx. 800GB of files (Doc, excel, images, etc) to the new server. Would I benifit from a 64 bit OS and would there be any conflicts with the existing servers on 32 bit. Also, whether or not if I choose 64 or 32bit, how about suggestions on incorporating a 2008 server with 2 other 2003 servers? Should I just stick to 2003 for now?