The speakers in the doors are of a decent quality. I think to really upgrade your sound system, you might want to think about maybe adding an amplified sub. I think that the Kenwood KSC-SW10

http://www.crutchfield.com/App/Produ...KSCSW10&tp=114

might fit under the passenger seat of a Base xFire.

Other than that, upgrading to Infinity Kappa 60.7cs or Infinity Reference 6020cs (both on sale) would be a good choice.

Or just replacing the 6.5" with maybe a Infinity Kappa 63.7i would work too.

Every once in awhile, the subs for behind the seats show up on eBay. LKQ re-sells alot of xFire parts-contact them?

As far as I know the wires are in place-just no speakers. You'll have to check

I don't work for infinity, I just have a good past with them.

You have a few choices, good luck!