I finally ordered my first upgrade to my SEL: Since I am inlove with sync, I now SORTA regret not poppin extra for the nav system, but I always planned to upgrade the stereo. I will not upgrade the HU for a nay system, but I have begun building my system. I listen to all kinds of music: from jazz to metal, blues to hip hop, etc I really wanted a system that about sound quality and clarity over just being "loud ass" so with that in mind I ordered: - TKO Audio BH-CAP18 1.0 Farad Digital Capacitor - Pioneer Premier TS-C520PRS 5.25" component speakers for the front - Pioneer Premier TS-D802P 6" x 8" speakers for the rear DOORS (decided against rear deck) and - Pioneer Premier PRS-D4200F 1200W 4-Channel Amp to power it all I think for Jazz, Blues, and Classic rock, this should suffice, however I will eventually get: - Pioneer Premier TS-W2501D4 10" Sub - Pioneer Premier PRS-D1200M 1200W Mono Amp To complete the system and some extra kick to my Hip Hop, Metal and Hard Rock without loosing out in the quality and clarity of my system. What do you all think?