I asked some shops for advice re a budget upgrade for my 3. I was initially choosing between separates and a small sub but it looks like the separates upgrade with deadening is the way to go. My usual sources are FM and MP3s via Bluetooth. I don't want to drown out outside noise too much as it helps with situational awareness. I'm only looking for a bit more boom for the buck.
Here are the offers that met my 5-8k budget:
TEAC seps + Kinetic Amp + Acoustipad
Ryan Audio seps + StP
JBL seps + Silent Coat
Infinity Reference seps + Silent Coat
I haven't auditioned these yet so I have no idea how they sound. I prefer a warm sounding setup.