Depends on your workflow, for some of my more intricate arrangements I require an event list and notation.
By the time you buy plugs to be more productive in live, it would have cost more than Logic pro.
For me I have been unable to get a polished mix with just Live's tools, when compared to more polished tools in Logic.
Live has taken on the role as my secondary DAW, because I'm not going anywhere near Steinbergs products anymore.
Studio G-fx 15inch quad-core i7 Macbook Pro Logic9.1.8, LPX 10.0.3