Ok, so I'm getting my tax return in a week or so. Around.. $1,200. I don't want to spend all of it, but I would really like to upgrade my sound system. Now being that I literally know nothing about car audio besides turning the thing on.. I figured I'd ask for help. I'd rather get some unbiased opinions on here before i walk into best buy and have some sales moron tell me what i should get. Right now I have the front 2 speakers replaced with Infinity Kappa 682.9cf 5"x7"/6"x8" 2-way speakers. That's it. They're hooked up to the factory head unit. I'm looking to get an amp and sub at least. Would i need to replace the rear speakers as well? If i got a new head unit, would I still be able to use the steering wheel controls and aux input on the center console? I've searched the forums, but haven't found anyone as car audio illiterate as I am haha. So it did not help much. How much should i expect to pay for a head unit, sub, amp.. and.. the installation all together? Suggetions on what types to get would appreciated too. Thanks in advance!