How much have you found the Image 2Bs for? If they're going near their $399 retail price, I'd get the M22tis instead. Most here will agree that the M22ti is better than the M3ti in most respects. The M22tis go for $400 -- if you can afford them, get them.

As far as the comparison between the M3ti and the Image 2B, I can't help you there. Spec-wise, they're pretty similar, other than the fact the PSB is a 6-ohm speaker while the Axiom is 8-ohm.