I think I've decided my audio upgrade for the Aurora. For the front speakers I'll go with Infinity Kappa 6 1/2" Components. I was thinking about the Infinity Kappa Perfects but they're too expensive for me right now. (They have an MSRP of $550.) For the rears I'll go with Infinity Kappa 6x9 2 ways and for bass an Infinity Basslink. Haven't decided on an amp yet for the front and rear speakers but it'll probably be a Pioneer with around 60-80 W RMS per channel. I'll be using the stock headunit just for the reason that the stock unit is decent and I want a stealth install to where you can't even tell I have expensive stereo equipment in the car.

Front Stage:

http://www.cardomain.com/item/INFKAPPA605CS?vq_id=none

Rear Speakers:(I already have these from a previous vehicle)

http://www.cardomain.com/item/INFKAPPA6925I?vq_id=none
Bass:

http://www.cardomain.com/item/INFBASSLINK
4 Channel amp possibility?

http://www.cardomain.com/item/PIOGM6100F

any comments/ suggestions?

the components lack midbass and tend to be very harsh, the same can be said about the 6x9'* also (i would reccomend the CDT CL-61a instead)

the basslink, i dont think will be very effective if mounted in the trunk (go for a single 10" sealed with around 400w rms)

and for an amp, just power the front components (~100w x 2) and run the 6x9s off deck power

I had planned on the basslink just for the fact that it'* so small and takes up next to no room in the trunk. (it can also be hidden away easily out of sight) I've heard it'* output is really good for being as small as it is. I'm not a bassaholic anyways. I used to have 2 12'* but I don't really want them now. I grew out of that I guess. As for the Infinities I have the 6x9'* already from my old car and they had great bass response. I've also had these same components too and after a few weeks of break in they were awsome. They were far from impressive and did sound harsh before breakin though.

yea, i did more research on the basslink, and it is deffanately a performer.
also, the infinity coaxial speakers are real nice, i dont know what i was saying before (go for the 3-ways'* though )

im still going to say that you should go for the CDT component speakers ($150 at thezeb.com) though. i think you will be pleasently suprised on how awesome they sound. (btw, they come with a silk tweeter, so the highs are smooth and not sharp)

wow speaker level inputs for the amp....awesome. i didn't know that could be done.