With the caveat that I am no how qualified to give someone like you advice on how anything to do with keys, and especially how they sound...
For organs, I'd make sure that the RD-EXP05 expansion pack from here: http://axial.roland.com/category/rd-2000/
is installed and go for that on the EXP button rather than the standard installed bank of organs. If you use drawbars, familiarize yourself with how the UI works because it doesn't just go into drawbar mode when you pick an organ preset. Presumably both of these are things the owner can assist with. (The default thing the drawbar like controls do is control volume of layers/splits IIRC.)
My take is it has a very good piano like action. Maybe not to everyone's taste, but it isn't for lack of quality. It is a board that should definitely be able to do the job you need to do. I recently played both a vintage Rhodes and Hammond, neither in great repair, and came away with a much greater appreciation for the modern stage keyboard :-)
As someone else posted, you can save a plethora of presets on the RD2000 so it can be configured in advance and one buttoned from thing to thing, including splits/etc. But the details of doing so, and the process of fine tuning exactly what you want, will definitely require some time sitting in front of it. All of the effects are on dedicated UI to the left which is intuitive enough that you can get reverb and the like under control just by looking at it.