One of the many reasons I switched from Dreamweaver to GoLive was its ability to use Smart Objects. Put simply, GoLive can enjoy a very special relationship with native Photoshop, Illustrator, and .pdf (Acrobat) files. This comes in super handy when you're resizing and optimizing web graphics.
Resizing a Smart Object file in GoLive doesn't mean your graphic gets resized by HTML code. Oh heavens no. GoLive generates a *new* graphic from the *original* native source file at the *new* pixel dimensions, without you dipping a single toe into the application from whence it came.