Ok, well im pretty much a noob in the audio/video dept and would like some advice on a setup that im contemplating. Currently, I have an Alpine CDE-9843 w/ pioneer 6.5(front) and 6x9's(rear). I was told pioneer speakers aren't the best quaility, but I'll upgrade them later. Anyways I was looking at these following sub models in a sealed box: Alpine Type R, E or the S. For the amp, im either going to go multi channell or mono. What are the pro's and cons for the amp types? I'm looking to get a decent system setup. Thanks for the input