Audio Systems: dodge ram stereo system, infinity speakers, alpine system

Question
I am looking into buy a new system for my 2004 dodge ram extended cab. I wanted to get an all alpine system. What size speakers do i need to get so it will fit in my truck. I think i need 5 1/4 inch speakers for the back and 6 1/2 speakers in the front is this correct? If I purchase the alpine type-s car speakers which handles up to 250 watts of peak power and 50(rms)for the front and 175 watts of peak power 35 (rms)in the back. would this make a huge difference in sound level than my original stock speakers which are NOT the infinity speakers? I also wanted to know if an alpine 50w x 4 cd deck by alpine would be a good idea and fit as well?       
           THANKS FOR YOUR TIME
                     Sincerely - J.C.

Answer
For all specific fitting questions, go to www.crutchfield.com :)

Would mew speakers make a huge difference?  It sure should, but I would suggest a 4 channel, dedicated amp for the maximum impression of sound quality and dynamics.

200 watt Deck power is notable but it is NOT what this doctor would order.


Sincerely,
Jerry Mael