used a version of orion for a little while in 2004. It has some neat sounds and interesting modules but I had lots of issues with it freezing up in the middle of a session and I would lose what I had done. Thank goodness for the auto save in live! Also a lot of midi issues when using external synths (midi hang). overall I found it frustrating. Could be operator error but still, I went to Live and haven't gone back.

Here's something I wrote primarily w orion- http://www.acidplanet.com/artist.asp?PID=459350&t=184