I just finished installing some Infinity 6820cs components($99) in the front doors and man, do they sound good. The detail and clarity is so much better than the stock 'components'. You can hear things in songs that were not there before. Bass is nice too. A bit punchier. Took about an hour per side, but I took my time. Plenty loud too without an amp-although the stock speakers are extremely sensitive. I mounted the crossover on the power window motor under the sound proofing mat. Just thought I would share this.