Well, the second mouting spot has the exact same mouting points as the regular stereo spot, so in theory, you can mount a DIN sized unit in the same spot if you have the correct mounting hardware, and run some power/ground wires (nothing I haven't had to do before..). The shelf unit that comes in that spot is made of plastic, and has a buil-in bracket. If all else fails, then yea, I'll just replace the head unit, if I can track down a tuner module and a decent 4CH amp.