DCM 50 is a mid-range driver designed to cross over at 9 Khz. DCX 50 is a coax. I don't use the tweeter.
Here's what you need to know. I like my speakers quite a lot and I don't care if they are flat, fat or phony. However, B&C is a very highly respected line of Italian drivers. I use them because Bill recommended them to me, not because I read the specs. RCF is also an Italian company, also highly regarded.
I included links to my drivers earlier. If you want answers, go back and read the thread. You seem like you want to challenge me. Why?
If you are really interested, do some research on your own. So far you have been too lazy to read this whole thread. As for your IMO and your presumed expertise -- save it for someone who needs advice. I have received sufficient guidance from Bill.