Just for the **** of it I'll let you read what Jim Grubbs sent to the SHOtimes list a few years back.
"I searched and searched on the list for advice on stereo upgrades for a Gen ll Premium stereo. I read over 200 posts. There was a wide spectrum, from popping in $59 6.5" and 6 by 8's to filling my trunk with amps, a box and 600 watts and spending $2000. After MUCH research, I settled on Eclipse speakers by Fugitsu Ten. The stock amp only puts out 20 watts or less per channel, [I read many conflicting posts on actual output, does anyone on the List know?] so speaker sensitivity was my prime concern. Nothing came close to Eclipse's 96 dB sensitivity on their speakers. Most others were 89-92 dB from JBL, Polk, JL, Pioneer, Sony, Blaupunkt, etc. Sensitivity means that a low powered system will play at a higher volume on a higher sensitivity speaker. I've read that every 3 dB increase in sensitivity is, in theory, equivalent to doubling the amps output. The Eclipse's 96 dB was the highest I found.
What I bought:
Eclipse 8263- 6.5" coax front door speakers, 96 dB sens., frequency response 90-20000Hz, $110 pair
Eclipse 8393- 6 by 9 3 way rear deck speakers, 96 dB sens., frequency response 50-20000Hz, $150 pair
Installation:
Front doors: very easy, just pop door panel and r&r. 8263 has an angled tweeter, so aim 'em at your ears when you mount.
Rear deck: Pop out stock grills, unscrew factory speaker adapt pug for 8393 speaker terminals [keep in phase, side of plug with groove is positive], cut insulation around old speaker, drill holes for 6 by 9 using template provided, put foam tape around trunk side of opening to seal where speaker will mount, mount from underneath using self tapping screws just long enough to hold. Replace factory grills.
Total time: 3 hours, including dinner
Results:
Highs: Wow, I was able to turn the treble down to 2/3 and have even better highs. Imaging in now much improved, providing a frontal soundstage
Mids: Clean and crisp with a noticeable improvement in clarity
Bass: A modest increase in bass, but I can defintely feel it more. Believe me, it's no pounding subwoofer, but tighter and better then stcok. If you're looking for a BIG increase in bass, this isn't it, get a sub. There is more, cleaner, tighter bass. I was able to turn the bass down to 2/3 and get better output then stock.
Volume level: I was able to reduce the amount I have to turn up the stereo to get the same output. 3/4 before, 1/2 now."
Add a good head unit to this, and it should sound pretty damn good, although it won't "boom" down the street!