Hey Guys, New here and new to the GTI. Your write-ups have been great. Just purchased a 2020 SE and have been looking for information all over the net for the best stereo upgrade options. I have installed many aftermarket systems on past cars but I just don't have the bandwidth to mess with it on my new GTI. Was thinking of having the dealer install the Helix sub or have a pro audio shop install a spare tire sub, new door speakers, amp , dsp. It looks like no one does this though. Seems everyone is going with the helix (even if they change the door speakers later) Is there a reason for this? I mean outside of trying to save money with a DYI.