Used CM8 or 20 yrs old mint 804 Matrix?

I have the choice of getting a CM8 or a pre-1998 Matrix 804 for around $1050 for the pair. It may sound like a lot for 20 yr old speakers but its in absolute mint condition, most likely a dealer demo. I have listened to both of them but about 2 days apart and I liked both of them. They were on different electronics.

I'd be putting them in a 250 s.f. basement room (non-theater Man cave), if size of the room is relevant here.

804 Matrix used to be B&W's flagship 8 series lineup. What is CM8's lineage?
I am thoroughly confused. What would you do?