Anyone run 2 head units?? i have the cda 9835 right now which im pretty happy with .. i wanted to get one with a built in screen as well the iva 901 maybe is there anyway i could run both these hu to a speaker amp so when i wanna watch movies fire up the 901 boom surround sound .. when i wanna listen to music fire up the 9835 and my music settings come on? thx