also one place you should check out if your new to it is
www.Crutchfield.com What Fits My Car
Nice thing about buying stereo stuff from them is they will send you a step by step install guide for that part, for you specific car. also if your unsure about something, or which part would be best for exactly your needs, you can call them and they'll help ya out.
i know when i first started getting into doing car stereo's they were a big help for me.
btw i have the Pioneer Premier DEH-480MP with the ipod connect kit. and i love it! nice thing about it too, is it didnt cost much. (i think i payed like 200 for the deck and like 40 for the whole ipod kit(bought this like 3years ago)