PS - Meaning you can add the sub as an enhancement, but if you want/need to listen to music without a sub, which is the most demanding application for most speakers, you'll have the right equipment. I'm talking about all other factors being more or less equal, such as size, price, and aesthetics. I think this philosophy -- getting the speaker that does the best on music w/o a sub -- will stand anyone in good stead for HT and for long-term investing in speakers, which after all don't grow on trees, alas.

Being able to match with a line of speakers is also important, so if you think you want to go with the ELT line/family, there's your decision. But if the M2 sounds best to you on music (or the M3 for that matter), you have to imagine the Axiom line will also sound better. The sub is a possible exception, with Axiom and any speaker brand, subs being the speaker least subject to timbre-matching issues, since the sounds are (or should be!) so low in the spectrum.

"These go to eleven."