So 6x8 or 6x9. I just was at goodguys (I know, I know...) and the guy said that the book lists it as 6x8, but that coudln't be right, they have to be 5x7. I am not planning on installing these myself. I did that with my last car, and it was a pain in the ass. Plus I never got my door fixed like it should have been again

The guy said that if I buy too big, that the installer can grab smaller, and then charge a price diferential (or money back of whatever), so I will trust you guys and go with 6x8.
Unfortuantly the only 6x8 that goodguys carries are Pioneer ($79) and Kenwood ($149), so I don't have much of a choice. What exactly should I look at when buying speakers? I am a big time newb here, I dont' know much about car audio at all. Also, if I buy speakers online are there any places I can take them to get them installed?
Also, I saw you mention:
> 50x4 watt max amp (around 20x4wrms)
The deck I ended up getting (I bought it today, but decided to wait on speakers) says "Total system power: 180W peak, Power output 45Wx4". So what is rms (not as in what is rms on mine, but just in general what does it mean). If I get an amp later, would it bypass this number (I am guessing yes, but thought I would ask).