I am getting a 1/2 din EQ/X-over for mine, I dont plan on running a H/U at all. just the 1/2 din eq, and whats going into it. Look into those, they have line drivers, basically. With the expansion of fine-tuning the sound too. And not to mention, they arent that much money. Audiocontrol 4.1 and 3.1 are pretty good. I am about to get a 4.1 from a kid locally. If I go with my original choice, I'll prolly list it here for sale.
I'll have radio, satellite, internet, gps, engine control and monitoring, air-ride control and monitoring, chassis cam, rearview cam, grille cam, dvd/cd/mp3 player/burner, the works, without a head unit...