Reasons to upgrade from CF Studio to Dreamweaver MX
General interface of Dreamweaver MX is improved over ColdFusion Studio: its more flexible, but at the same time does a pretty good job mimicking it.
Innovative features, many improvements such as better database interactions and the ability to generate common HTML forms based on your database table.
Many more ways to extend it—add behaviors, server models, extreme snippets…
Live Data view…awesome! (Like BROWSE in CF Studio, but better!)
It appears to be the way Macromedia sees the future of the IDE.