OK, so I bought this 97 4x4 two days ago and am already plotting upgrades. The truck came with a Boss DVD4200b head unit (total junk) and a flip down monitor. I want to keep the monitor, but want to replace the head unit for something that gives you more control ie: seperate sub control, better EQ, ipod interface, double or triple preamp etc. Anybody know what units are out there for under $4-500? I have found a few units, but would like to know if there are others. BTW my plans are JL or Infinity front and rear with a 10" sub and 2 amps. Regards.