I don't know anything about Abelton Live 6, but 5 is rock solid and awesome for live performance. I have two friends that are dj's and both use Live and small set up with a powerbook that's it!
http://video.google.com/videoplay?do...89565742&hl=en
he uses live check out Live at the Boom you can see his set up.
on dogsonacid he talked about his setup too.
Good Luck!