I used FLSTUDIO for 2 years or so...Then got tempted by Ableton Live and finally decided to Purchase SX3.
Since the version 3.1 I can say that it is rock solid on my system.
It might not be the easiest sequencer to learn at first but there are great resources (
www.askvideo.com for dvd tutorials,
www.cubase.net for the help forums,
www.auxbuss.com for various video tutorials).
And it works really well(at least for me
) with the TI...
Awesome combo IMO.