996 stereo upgrade questions

[tcleaver]

I know there are a ton of threads about this, and I have reviewed a bunch of them on this and other sites, but most go above and beyond what I am trying to do.

I have a '99 996 with a stock stereo system (CDR-220 upgraded from a CDR-210, 6-disk CD changer, M480 amp, 2 dash speakers, 2 door speakers and 2 rear speakers). The only addition is a bazooka behind the rear seats that was added by the previous owner. I am not sure how the speakers and bazooka are connected but they all are working and there are no other components (amps, subs etc) in the car. Of course the sound is crap, as everyone knows, so for now I just want to replace the dash and rear speakers and perhaps the amp. I don't want to do any physical modifications so the new speakers need to fit into the standard space provided. I have already purchased two sets of original Porsche speaker grills to reuse for the new install.

Question 1. What speakers should I get for the dash and rear?

Question 2. Can I replace the M480 amp with something more powerful but keep the CDR-220 head unit? I know a lot of people think the Becker/Porsche head units are crap but they look good in the car and I can't stand the plastic/bling look of the more modern head units.

Question 3. Is it worth keeping the bazooka installed?

Thanks in advance for your help.

T