There may have been some confusion in my last post. I was under the impression that the OP was getting these speakers for theater only, not music. My Deftec recommendation was meant to be taken in that context. If the amp is going to be a Marantz receiver, I think the system would benefit greatly from having the built in subs.
As far as MA goes, I think they're great. I've owned both brands in the past and much prefer the MA. However, given the application and the OP's current equipment, the Deftec is just another option he may want to consider. Also, when it comes to 3d imaging, every piece in the system contributes. If any one piece is not good with 3d, you won't get it; even if all the other ones are. It's really just a matter of what is important to the OP. He has to listen to it, not us.