Well, that speaker uses some burly pro style drivers that are probably stiff right out of the box. But even that shouldn't really matter. The speakers are assembled and tested at the factory, presumably. Any significant break-in should occur within just a few moments of them playing music, which would have occurred then and there. Also, OB types do exhibit greater excursion, so I would think that pretty much any music would exercise the drivers enough to "break them in". I say don't worry about it, just throw on your favorite tunes and start rockin out.
Interesting that they won't accept returns until after 60 days. Typically, shady peddlers will use the break in myth as an excuse to get folks to simply tolerate bad gear until they become acclimated, at which point they are either past the return date or just don't sent it back.
For you, assuming the speakers do the basics well and sound good to you right away, your biggest task will be figuring out the dipole/room interaction thing for maximum effect. They need a lot of breathing room in order to work properly. This is another reason why you may want to focus on the room they'll live in long term, rather than trucking them around to different places.
If you have the available real estate to accommodate ideal placement, then it's a matter of if you like their peculiar quirks. For example, they necessarily involve local acoustics to a high degree, which can do wonders for particularly dry recordings, but for recordings more rich in ambient information, the added local ambiance may be too much of a good thing. The sweet spots tend to be highly focused and tiny, but within them some cool things happen. Dipoles are interesting, for sure. You'll soon know first hand.
