GRod926 wrote:
I'm starting with Mainstage and would like to control it with my Nord Stage Classic. . . I wonder if I should just get a dedicated controller...
It depends on what you want to do in MainStage.
I had a quick look at the controls of the Nord Stage Classic. They seem to be dedicated to that specific instrument & allow you to control the sound in quite a sophisticated way. They are supposed to allow you to control external devices, but you don't have many controllers available for that.
If you want to make full use of MainStages options, you may be better off with an additional external controller. I find the EU-33 is very versatile & not too expensive. M-Audio supply them now. It gives you 9 faders, 24 rotaries & 10 buttons. Each one can be set to any MIDI channel & any MIDI control number. 43 controllers should allow you to control MainStage in many ways.
If you decide to adopt that route, I am willing to help with layouts & controls.