Speaker with most dynamic PUNCH?

Any ATC. All punch way above their size. As you correctly surmise, it boils down to large magnets with short coil in large gap and larger diameter voice coils that can cool effectively so that thermal compression is minimized. The other factors are a box tuned to be critically damped or over damped and a forward midrange (mids can effect our perception of punch).

go with larger models with larger drivers ofgood quality and design and the rest is personal preference and a suitable amp with enough juice to max out
performance.

Audiofeil, Yes, I think Marty's guitar amp had some PUNCH!

If you are looking for punch in a 2-way, look no further than the Klipsch RF-7 or RF-7II. Very dynamic, efficient, and will knock you off your seat. Mate with a high current amp on the warmish side and you should be very pleased.

Bill

Vivid speakers