Let's look again at these charts - I'll compare the M80s versus the Paradigm Studio 100s because I'm familiar with the Paradigm product.
On axis response for the Paradigm product is very flat to 700Hz (about an F5 for the musically inclined) and stays relatively flat until 12K, when on-axis response slips with a sharp -4dB SPL dip.
The Axiom M80's frequency response is "much" more erratic between say, 150Hz and 800Hz, but the highest variation from a flatline I can read is a thin sliver of a 5dB SPL dip at 625Hz or so.
Without a doubt the Paradigm product shows a flatter frequency response throughout it's effective range, but the M80 is still a very good and flat speaker, and at half of the cost of the Paradigm product, I can forgive the maybe 2-3dB SPL average difference in response (note: a 10dB difference in SPL equates to a perceived doubling of volume to the human ear) - and for the price, a pair of M80s probably sounds a lot better than a single Studio 100.
Bren R.
