I have several questions about replacing the stock speakers in my car so I am just going to create a numerical list, but first is a little information about my car.

CAR/MISC INFO
-2002 Mitsubishi Eclipse RS
-After I bought the car I found that the stock amp underneath the passenger seat was missing so I currently do not have any amp installed
-My head unit is an aftermarket Alpine CDE-9843, specs can be found here: Alpine CDE-9843
-I listen mostly to hip hop and R&B
-I want this to be a permanent fix and would prefer it to be done right the first time
-Budget max is $450
-I am an amateur car audio enthusiast so please keep it simple for me
-I very much appreciate all suggestions and help offered

QUESTIONS

1. I am considering purchasing four 6 1/2" full range speakers between Pioneer Premier and Alpine type R series, but am willing to spend more money for better quality. What are the pros and cons of these two?

2.What is the max RMS power range should I get out of my head units built in amplifier? The website listed above lists two separate built in amplifier RMS power ranges and I am confused as to the reason.

3. Do I need or is it practical to buy an aftermarket amp and if so what specs/brand name should I look for? I.E. 2 channel, multi channel, 1000 watts, 2000 watts, etc.

4. Do I need to buy an installation kit, wiring or any other accessories?

5. Should I disconnect the speaker that is on the center of the dashboard?

6. Are speakers easy to self install? I have little experience with electrical wiring and installation but have been told is fairly simple.

Once again I very much appreciate all the help that can be given to me so I can make an educated financial decision.