For a lot of us, I don't think ProTools is the way to go.
Somehow, it's become something of an industry standard, but I'm not sure why exactly.
Two big problems (or maybe they're part of the same problem) with ProTools- First, proprietary hardware. Second, can you say EXPENSIVE?
Of course, since it's become a 'standard', it has the advantage of making your mixes easily portable to other ProTools studios. Using something else doesn't make this impossible, but perhaps a little more complicated.
I don't know a lot about ProTools, but aren't its MIDI capabilities fairly limited? I'm not sure how your Behringer will integrate into a ProTools setup. I suppose, if you use it strictly as a controller surface for softsynths and render the subsequent performances as audio, it would work. But I'm only guessing. Someone who knows what the heck they're talking about should jump in before I embarass myself further.
For most of us here, I think you'll find we're using a mix of programs like SONAR, Cubase, Logic, N-Tracks, and others. Hardware choices are even more diverse. There is no single "right" answer.
Ted