This photo (no contraband) shows what I have to work with:

My first thought was that I might get a W9 head into the 'bin' at the bottom of the photo (which closes, which would permit me to hide the radio when it wasn't in use), but I realized that I'd practically have to look behind me to use it, which is a recipe for rear-ending someone.
Underneath the center console is hollow and open, so I could mount a speaker / drawer there. (I figure the drawer will end up in the back of the car, though, and I'll remote-head a controller, mic, and speaker.)
The other location that seems great would be the space just below the (factory AM/FM) radio, but I think it would block me from shifting into park (which is kind of important.) Where else would you guys recommend mounting?
Are the W3/HHCH controllers expensive/hard to come by?
Does a roofrack cause a lot of problems for mounting an antenna? (Radiation pattern-wise.) I'm thinking of a short whip near the back of the car, so it won't be in the center of the roofrack, but it's still awfully close to it.