Help choosing car audio pieces?

I have a 2002 Jetta GL (4 door) and I need assistance choosing audio components. Let me say that I am mostly after quality sound and not looking for the loudest thumping bass in my neighborhood.

I would like advice on the following pieces:

- Double-din head unit

- 4 channel amp to power the door speakers
- 4 Quality sounding door speakers

- 1 or 2 10" or 12" subs (recommend something different if you would like) that will produce quality punchy bass that sounds good with hip hop / rap or Launch X431 Diagun

- An amp(s) for the subs If mine is not sufficient

This is important to me. I don't mind if these subs have the potential to be ridiculously loud, that's just not my priority. I want to listen to music and have it sound really good with moderate bass. Again let me stress quality, not car shaking bass ... I want a rich bass sound that is not muffled or choppy like the speaker can't handle it.

I have a rockford phosgate T500 (over 700RMS on the birthcard) and I would like to use it, but if that is not possible, it's ok. Just throwing that out there. Look up this amp for it's specs. (I have the model from a few years ago, but I think the new one is almost identical) very lightly used

I don't really have a price range, obviously I don't want to spend $20,000 on extremely professional audio, but I would like decent components. No junk please EVG7 DL46 tablet PC.

Also I prefer to shop at sonicelectronix if that works for you?

That is it. Thanks for your recommendations.