Hello, I have been looking around for a 4 channel amp for my front 6.5 and rear 6x9 speakers. I want an amp around 50x4 rms at 4 ohms. I am looking for one under 100 bucks, the cheaper the better. I have seen various amps that fit this, but my knowledge on brand quality is nonexistent. Anyone know of any amps that fit the criteria?