Congratuations on your new speakers.

The DMTs are proper speakers in the sense that they are big (often a good thing), have really high-quality inert cabinets, great drivers and a well-balanced, very dynamic and accurate response. 

But they need more power than their efficiency would imply and their stock crossovers, while good, are not quite up to the same standard as the rest of the speaker (but can be upgraded).  They ideally require subs (apart from the 215, perhaps).

But they are definitely a bargain, especially s/h, as you get far more bang for your pound than with most domestic speakers.  No question.

Cooky is the expert on this range, far more than me.