For composing work, I find a "real" piano action controller is a pain in the butt when it comes to doing things like drum programming, clav and B3 parts, etc. Heavy piano weight action just always seems too slow to me for that kind of thing...
Granted, I'm not a trained piano player really.
But depending on the kind of composing you're doing, you might either want more of a hybrid synth/piano controller (like the Kurzweil 2600, my fave). Or you could consider getting a second lighter 'synth' controller for the non-piano parts.
Just a thought.
In the "piano centric" world, I'm also a fan of the Yamaha S80's and 90's.
