All of my avatars are amazing. They all have dovetail joints and are upgraded versions though.
I have (2) custom signature 2x12's both sound awesome. 1 has v30's other has greenies, I really only use these for lower/medium volume home stuff.
The custom 4x12 with fl k100 is as tight as anything I've had. It brings the thump in spades.
I've had/have Diezel, Friedman, Mesa, Bogner, Marshall, to name a few big names. And within those names, I had both 2x12's and 4x12's for reference. I agree though I've had some avatars that were meh.
My custom ones are the shit though, and hang right there with my big name cabs