Studio One was a great find mef! I've been playing around with it and like the interface much better than Ableton. I did manage to crash it though. For some reason, it crashes every time I try to load Hypersonic VST. But all of the Native Instruments libraries seem to work fine.
its great but it was actually cytochrome that told me about it in this thread, so i cant take any credit for the find. haven't been able to crash it myself yet. i love how melodyne is integrated into the shell.