While sitting in your Butt Contouring Cushioned Recliner?

I doubt that high tech terms are enjoyable nor understandable for the average person. ("Just push the octopus button on the Spongebob amp, son").

Axtreme 1000
Axtreme 1250
Axtreme 1500

Axcel 1000
Axcel 1250
Axcel 1500

...will save my third nomination after my people have discussed it further...carry on....

This lineup of Class-D amplifiers aren't really geared towards the average audio/home theatre enthusiast. At the price points it is more reaching the high end market of power amplification.

The eXperience series (X1000, X1250....)
Live Concert (LC1000...)
Or the combination: The Live Concert eXperience (LCX1000).

How about "D series" to highlight the differentiating aspect, Class D amplifier:

D1000
D1250
D1500

Going with simplicity here. Seems to be a theme with all things Axiom including the cabinets of these new amplifiers.

Power Amp

PA1000
PA1250
PA1500

Keep it simple, how about
Axiom A1000
Axiom A1250
Axiom A1500

Just like M50, M60, M80

I suppose I should also include "DA series" to protect myself

as in DA1000, DA1250, DA1500

I keep coming back to the theme of flexibility. I really like the name Digiflex, or DigiFlex, to summarize how it's a digital amp with the flexibility to send more or less power as needed for the situation/set-up. I see that Digiflex is a name brand of cables, though (in Canada, no less). Maybe you can strike a kind of deal with them, pointing out that there's also Digiflex cameras, flex fuel converters, ink jet printing systems, digital servo drives, and hand exercisers, just on the first page of Google results for "Digiflex". So, just in case:

DigiFlex 1000 amplifier
DigiFlex 1250 amplifier
DigiFlex 1500 amplifier