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i figured it was time to upgrade the stereo system and had some questions....my friend just gave me an alpine amp model 3527 4/3/2 channel and i was wondering if this was a good amp to use in my setup.......i really dont want to spend too much money on audio upgrades but i do want quality sound.....I want to spend about $200 on a HU (i'm stuck between kenwood or pioneer, which do u recommend??) and maybe $100-150 on a single sub (I was looking at some JL subs)...i dont need a huge system where everyone can hear it in a one block radius, i just want decent sound and good bass. So what HU and sub would go good with this amp or would you suggest trading in the amp and buying a new one?? I also plan to upgrade the speakers to.....i dont really know jack about car audio so any advice would be helpful...thanks