I am adding a Blaunkupt CD player.. it is 200Watt. 4x 50 for peak power, 22 watts RMS.

can be seen @ http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1251567864

A buddy is putting in a Subwoofer, and Amp, but I need to get 4 speakers for the doors. I don't want to spend a whole lot, but I want something decent to start with, and will fit my car and not blow out from the 200 Watts. I am looking to spend $100 or less, if possible. Can someone tell me confused what size in inches taht I need for my car, and what a good model is for my price range.

Thanks,
Justin