In this case you will get more options with the 770mp however the preout voltages will be higher with the 770mp if its the premier versian. I am a Eclipse Fan for the added steeper slopes and crossovers altough you cannot beat the Pioneer Premier units for the money. YOu get all the options including satellite ready if your looking for that feature. I have owned Alpine and the Pioneer Premier 860mp and the Eclipse CD8454 and i think that you really cant go wrong with either brand. For simplicity sake i whould take the 770mp if its the premier and also know that the pioneer is face detachable and the Eclipse is not and has a differant ESN security theft protection that makes the unit useless if stolen and tracked down electronically by ECLIPSE