Being from LA, I find the argument almost comical, the actual sound
produced means nothing, no its all about the look! Like its a software
fashion show.
But anyways terminatorX has a cool looking GUI and runs even under my
crummy system.
Hydrogen looks great, but terminatorX will run on systems too slow for
hydrogen. You can use jack, or not and go right to alsa if you're
having performance issues with jack.
http://terminatorx.org/