Good reason to upgrade to SQL 2008 is if your company uses Office products 2007.

BI - Excel import export of data to 2007

..unless there is some add on driver I don't know about like

SSMA sql server migration assistant for access 2003 and 2007.

Excel 2007 - more then 65,000 rows, and business analytic tools(really just wizards, but make it fast if you know what you want)

The SSIS packages follow a stricter Development environment which I think can be good, but still has those wizards, there just in different places. Take the time to look for them.

And more importantly If not upgrading all servers, continue to upgrade a test environment , don't wait to fall back until your forced to upgrade and see a complete departure of what you are used too.;-)