Here is my situation. This is not for my car, it is for my fiance's so I want it to bee good but inexpensive. I can either get a mono amp for the sub and a 2 channel for components or get a 4 channel and bridge one of the channels for the sub. I would like an amp that puts ot 75-100 watts per channel that is less or around $150. I haven't bought the comps yet and for now I just have a polk gxr 12 in a ported box in her car. I have looked at the tsunami 440, profile CA and Cl 640 and Us Acoustics 4085. Anyone have any recomendations or experience in a setup like this??