I'm with PFunk.
Although I did try Image-Ready and Go Live about 3 years ago when Dreamweaver was around version '2'. It could've been earlier than that actually.. *signs of memory damage*.
Its actually funny, because everything Image-Ready did, Fireworks did better. And everything Go Live did, Dreamweaver did better. This is going back 3 - 4 years though.. so things may have changed drastically since then..
I haven't been inclined to look elsewhere as Dreamweaver does it for me currently.