2003 SBS and NT Server

I currently have 2 NT 4.0 servers, one for data and one MS Exchange 5.5. I would like to replace the data server with a new server running Windows 2003 Small Business Server Standard Edition. I would also like to keep my current Exchange server.

Will I be able to use this setup? Will I be able to use the SBS as the pdc and the NT4 server as the bdc? With active directory; can I run both? Any problems that you foresee?

Thank you,
Don