Quickly downloaded and tried X3. Wish I had more time...
...but I bought it. What the hell, right? Haha!
Quick-shot trial analysis:
+ It was nice and smooth
+ MIDI and audio clips in the track view stand out more
+ MIDI and audio clip names in the track view can actually be read/seen
+ EQ with built-in spectrum analyzer is well implemented - no more SPAN?!?
+ Piano roll was defaulted to white, but it wasn't too bad. Liked it more than my oscilloscope (custom) colors in X2.
+ Better implementation of horizontal meters
+ Main console bar at the top "pops" and is better on the eyes. Maybe I can toss/uninstall my Duckbar??!
+ Meters seem to respond a little quicker