The first thing I ever purchased on credit was a Denon head unit. It was the deadhead model that didn't have an internal amplifier, only pre-outs.
My first system was in a Honda Accord with a Denon deck, a little four-channel Hifonics Europa, MB Quart in the doors, and two Black Magic 10s in the back. I ran the battery out of that car every weekend... for years. It doesn't sound like much, but I loved that system. I had that little four channel bridged and running two ohms.. still have it..
After that deck, I switched over to alpines and been using them ever since..
I have a full Alpine system in my wife's Tahoe with the iva-w505, type x components,. PDX amps, Alpine imprint, type x sub, etc..I got to be honest, I don't like that system.. I think it just needed better amplifiers, but the wifey didn't want me effing with her car..


. I bought all that stuff from Wild Bill here from the board when he worked at Alpine.
In my "weekend truck" that I don't ever drive either,

I have my Alpine deck, I don't remember what it model number it is, got it 2010 2012ish..
It's got Infinity perfect 6 separates in all four doors ran by 2 PPI art series and 12" infinity Perfect VQ's ran by a hifonics Zeus VII. I recently installed a JL audio sound processor (twk-88), did a rough tune with it, but haven't really messed with it since. There's a lot to tweak on that thing!
In my garage, I have anything from PPI to Rockford fosgate, soundstream, Orion, hifonics, more MB Quart q series speakers that I can shake a stick at, another four or five sets of Infinity perfects, along with a bunch of subs. I've always collected car audio shit my entire life.
One of the most beautiful amps that I own is a.couple MB Quart Q series made by Rockford fosgate from when they bought them out for a short time. I think they only made them for a couple years. Such a beautiful amp inside and out... (QAA-4250's)
My most prized amp is a Zed audio "The Deuce".. basically a modern-day version of the Zeus.. only because I'm a Zed audio nut I guess.. there's nothing real special about it other than it being a sound quality powerhouse..
I got similar stuff for home audio as well, Denon amps, kappa 6,7,8's, kappa ssw subs, etc..with many extras...
I need to clean out the garage to put shit in a storage container and I plan on laying everything out so I can take a picture of it all... Should be interesting cuz I honestly forger half the shit I have in there.