I have a pair of Alpine Type R components that I really really love. Most people reccomend the Infinity Kappa Perfect series. I'm not sure what size your front speakers are, but www.etronics.com has the 5 1/4" and the 6 1/2" set for between $220 and $240. As far as an amp goes I have always used Alpine amps for main speakers and Rockford Fosgate (Old Rockford!) amps for subs. They have a an Alpine MRP-F240 4 chanel that you could bridge. If you decided to run rear fill speakers you use it in 4 chanel mode. It should all total with shipping under $400.
thanks for the feedback. I actually own the alpine type r's and also the mrp-f240. I use to have it in my old car and i had it running off the 4 channel and only giving it 40rms but now im thinking about bridging it so i can get 100x2rms @ 4ohms..I hope i dont over power them. But im sure itll sound much better this way.