Welcome to the Axiom forums Redo.
If you can afford to put both on your credit card for the trial period (30 days) that would be the way to go. Then there would be no "what if" to think about.
If you plan to do this I would also suggest you talk to their customer service representatives in advance so you can explain to them what you plan on doing (comparing M3 and M22) and ask them about the possibility of free return shipping (which is somewhere between $10-$20 on the bookshelf speakers) along with the full refund of course on the speaker you plan on returning within the trial period.
Enjoy the sound!
