I completely understand you. I just got my '12 mazda 3 as well. I started with just the outside so my warranty doesn't become voided. I got a clear bra. some tint. Im using CorkSport as my main aftermarket supplier. I just got their license plate relocation kit. LED interior kit. They also have the rear bumper LED that can be hooked to your turn signals (i think its really cool). I have DDM HID ordered. seems like everyone recc DDM tuning. They are really cheap, $40 a kit (x2 low beam and fogs) Let me kno if you need the sizing on your bulbs. Overlays for your lights. Footwell lighting, the OEM ones are $130ish online, not sure if you seen them, they match the blue in your car and turns on with your drl or night time lights. I also got 2x 12" kickers, one dealer said they wont void my warranty. Also the same one said they dont mind me tuning as long as i dont mess with the emissions and tranny. I had to look around, lucky i live in Houston Tx so we have several to spare =) Thats bout it that i can think about. Also accordin to CS, no warranty is voided till Mazda can blame on the aftermarket part that caused the failure. Your aftermarket intake wont be the reason your rear window all of a sudden crapped out. Since i found that info out and a dealer whos cool, i started over looking the warranty deal. Also i keep the OEM parts so if i need to change before goin to dealer i can. Sorry for long post. just had a lot to say, hope this helps in any way. let us kno what you do first!