Car Stereos

So, I recently blew out rear speakers, and had them replaced. I got some Vibe speakers in the back, but they sound so good, that now I figure it's time to upgrade the whole sound system. I'm spending a pretty penny on a new car system, and think it's worth it, since realizing that stock car audios can be really basic.

It's not top of the line, but it's a great starting point. Getting a Pioneer stereo with all Vibe speakers. I think it's a must have to have an after market system put in now, after hearing stock speakers, next to after market speakers

Do you agree?

If you are a car stereo buff, talk about your car stereo system, and explain what is key in a good sounding system. I'm only spending a grand for a new system, how much does it cost for top of the line stuff?