If it is like my 2000 SE with the 6 speaker stereo, I would clip the
leads to the dashboard tweeters and find some good quality speakers for
the doors. The factory speakers in the doors are pretty cheesy looking
full-range speakers.  If you had a couple of days, I would suggest going
to Crutchfield and using their database to select proper replacement
speakers for the front doors. I am quite happy with some Polk 2-ways
they recommended, they were less than $100 and their instructions were
excellent. You could always go to Crutchfield's website, see what fits,
then truck off to Best Buy or Circuit City for replacements that fit
your budget and car.

The good thing is that there are decent speakers that will fit the
factory grilles with minimal fuss. The factory radio is rated at 20
watts RMS x 4 and is made by Alpine, and performs well and has good
ergonomics compared with most of the flashy aftermarket radios out
there. For $200 I added a USA Spec CD player which fits the factory
opening, but the EX already has one. In addition to the Polks up front,
I put some Infinity Reference 6x9 2-ways in the back, and finished it
off with a Jensen 300 watt amp to drive a 10 inch Infinity Subwoofer in
a Qlogic box in the trunk.  For about $700 it sounds awesome, and is
totally stealth.