Ableton Live version 9 will be available March 5th. Until then, you can purchase Ableton Live version 8 and receive version 9 for free when it's released. There are some exciting features to this DAW, and several different price points available depending on your needs. The introductory version is only $99, the standard version is $449, and the full suite is $749. Remember, 25% off of each of those prices until March 4th!
You can read more here: http://en.audiofanzine.com/general-sequencer/ableton/live-9-suite/news/a.play,n.15320.html