I have a 25 year old car, and I think the HU needs changing. There's sound of popcorn in the front speakers, plus, the current set-up delivers a flat so-so sound. The HU also shots down when the volume is at high setting. Also, I checked the radio wiring of the car as I wanted to change how it was powered. Even with the keys out, it could be turned on, so I pulled out the radio and exchanged the two power wires (unswitched and switched), and with some success, I managed to put the power on position 2 or accessories. However, the clock would always reset every time I turned the keys, but the radio memory stayed unaffected. So now, I think I need a new HU.

Here are my preferences:
1. Should be able to drive all 4 speakers.
2. Should have a provision for subwoofer set-up
3. Should have equalizer function in order to make for easy tuning.
4. USB and Aux-in
5. Should be black and have amber lighting to match the dash

Objective: sound quality.

Honestly, there seems to be limited choices---Alpine, Pioneer, Kenwood, but still unsure on what to pick. I want a value-for-money set-up.

Would appreciate advise i.e. suggested set-up, shops to go to, etc. Thanks!