Nothing special here. Swapped the door speakers and tweeters with Infinity Kappas. Couldn't go up to 6x9s because the brackets wouldn't fit but I'm happy with the result.
Alpine 4 channel amp under the passenger's seat, Pioneer shallow mount sub in the spare tire well in a custom mount.
Pioneer AVIC-Z140BH HU with bluetooth and XM.
Ran the iphone cable through the glove box. The neat thing about this system is that other than the HU, everything is totally invisible.
Should probably mention that the bluetooth functionality is now worthless because the car is too damn loud to take hands-free calls inside it.
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