Give me your opinion. Talking STRICTLY web design here.
Also please don’t harp THAT much on the vector aspect, I use Adobe Illustrator CS3, so unless you see a reason why working with vectors with Fireworks is better than working with them in Illustrator, just keep that minimal.

I’m looking for a compelling argument. Not that you couldn’t make one out of vectors vs. raster, but many people I know will try to simply answer (Fireworks does vectors and bitmap so it’s better) or something silly like that.