As for setting up, everyone has a different opinion.
Some people think you should set up those towers as FULL-RANGE and use ONLY the speaker connection, not use the LFE/Subwoofer connection.
When I owned the DT BP7000 and BP7001, I set them up as SMALL speakers and used the LFE/Subwoofer connection.
I think I set the XO at 80Hz back then. Most people think if you're not sure, then 80Hz is good.
I think my current XO is at 120Hz. My speakers go down to about 50Hz.
But even when I owned Revel Salon2, I still set them up as SMALL and XO at 120Hz because I wanted my subs to do most of the bass work.
Who's got the best setup?
It's trial and error.
If it sounds good to you, then you got it right.