try KVR would be a first port of call.
as said above demo all the software your can, once you learn one daw you pretty much know what stuff does, midi, audio, tempo, click.
as far as I know only logic doesn't have immediate access unless you first set up presets in the 'environment' and the modular workstations for ableton..... psycle?
live is a pain to record into, unless I guess you have one of the myraid of compatible control surface.
I'm not sure what midi is like in Pro-Tools these days, in my experience for rock solid timing logic is good, for real-time midi effects, tweaking many velocity, pitch bend, attack, decay, sustain, release. Filter low pass, with resonance.
Any midi parameter you can think of has presets for transitions, upward, downward, sine waves... whatever.
Cubase or Nuendo; rewired with ableton or reason (for audio)
I think the .rex file player in reason is now called Dr. Octagon.
Consider Spectarsonics Stylus and Omnisphere. Stylus slices up beats or has a real time preview of it's own database of 'sliced up' beats 3GB's worth.
These beats can be re-arranged in real time through the VST software as well as taking advantage of Steinbergs own real time midi effects.
This really only means you can create cool sounding stuff in a loop right?
Once you layer your midi to create the perfect sequence, hit the midi meltdown button, it may be called bounce, mixdown midi, combine.