Subs/Amp Shopping..

Hey guys, I've got a 1998 Cavalier. I won't pretend to know what I'm talking about when it comes to the audio of a car, so that makes it really kind of hard to shop for the best amp/subs for their value. Being as Boxing Day is coming up, I figure maybe I'll head out to see if I can get some discounts on subs/amps, and even if I can't, I've been planning to do this for awhile now. Rather than looking stupid at a store, I figured I'd ask my questions on here using the beautiful thing that is the animosity of the internet. :iceslolan

Anyways, my current setup.. I've got;

A Pioneer MP3/CD Deck (DEH-P5000UB) http://www.bestbuy.ca/catalog/proddetail.asp?logon=&langid=EN&sku_id=0926INGFS10095551&catid=21981

A set of JBL 4x6" Speakers (GTO6427) for the front
http://www.bestbuy.ca/catalog/proddetail.asp?logon=&langid=EN&sku_id=0926INGFS10075201&catid=20111&test%5Fcookie=1

And a set of ENERGY 6x9" 3-Way Coax Speakers (ENC693X) in the back
http://www.futureshop.ca/catalog/proddetail.asp?logon=&langid=EN&sku_id=0665000FS10088303&catid=&test%5Fcookie=1

I like the sound of everything so far, but I'd like a louder upgrade. Not to the point where it's going to blow the roof off other people's houses as I drive, but at least make it recognizable. It really comes down to sound quality for me though. I know the stuff I have really isn't the greatest, but it's not bad, and I'm happy with the sound.

What do you guys have? What would you recommend?

Any suggestions as to what I should be looking at for the best sound at the best price would be greatly appreciated. I'm not really sure of my budget, I guess really I'll have to base what I'm going to spend after I've done a bit more looking, so any suggestions would again, be greatly appreciated.

Also, how hard is it to mount amps and install subs in the Cavs? Or would it just be best to get them installed? (I'm not sure the price of installation at like a Futureshop or Best Buy in Canada, but I'm sure I could find out.. unless anyone else has a quote?)

Thanks a lot guys, and happy holidays!

Minoxide