1: What is the Year, Make, and Model of the vehicle. - 2015 Jetta TDI SE (doesn't have fender audio system)
2: What is your budget? - $1500
3: What exactly do you want your outcome to be? (Good sounding music, or loud bass?) - Good sounding music
4: And specific sub sizes that you prefer more than others? - No
5: How much trunk space do you want to use up? - 1/4
6: What type of features are you looking for in a CD Player (aka Head Unit)? (Ex: USB, AUX, BlueTooth, etc) - Don't need new head unit
7: What type of music do you listen to? - Rock / Metal
8: Is your stock stereo system amplified? (You may or may not know this) - Probably not
9: Do you have Steering Wheel Controls? (Volume/Seek on the steering wheel) - Yes
I just got $1000 from Volkswagon due to the fiscal they started. $500 is dealership money so I can probably pay them to install it. My last truck I installed a Polk system myself which was years ago. Not sure what is good nowadays for rock/metal.