Celica Forums General Discussion Interior Need help on choosing speakers

I've been looking at these Pioneer TS-A1675R coaxial speakers.

http://www.amazon.com/Pioneer-TS-A1...727003&sr=1-1&keywords=TS-A1675R

Would it be fine to put these in BOTH the front and rear?
If so, what else am i going to need in order to install these speakers?

I heard the front speakers in a GTS are component and the rear are coaxial?
What exactly does this mean?

I also plan to put a subwoofer and amp as well, but not really so sure on what to pick or look for.

Hey what did you decide to do? Cause I am also thinking about butting in aftermarket door speakers

ive always gone sony. its a japanese car, keep it japanese. xD no, but sony will treat you well, just dont get those damn walmart ones. anymore however, brand amung speakers doesnt mean to much, it ends up coming down to how many watts, what does it look like, etc. just make sure the wattage of the head unit is higher than that of each speaker combined.