The 3000 would eat the 125 for lunch. And it should. It costs way more.

In a real room the 125 dives after 40hz. Just replaced two for an owner that upped to dual 500s. The owner thought with his wallet initially and ended up wasting money…. Oh well.

In a small bedroom or desktop setup 125 would be ok. Movies? Ehhhh….

I think the EP500 is not much bigger practically than the footprint of the smaller subs. Taller moreso.