I believe the VP180 will bring new customers into the fold, likely people who were sitting on the fence about purchasing a pair of Axiom M60s/80s based on some reviews(and heresay) of the VP150. It would appear that the VP150 may be better suited to the M22s, where the new VP180 is clearly meant to compliment the towers.

Half of communication is listening. You can't listen with your mouth.