Yes, it's all about the sound. I could care less about what it looks like. $10k on the used market is fine as well.
At this price used you have plenty of alternatives. If you like MBL's and final sound then I assume you listen at low levels and you like a speaker with great ambient sound? Neither of these will play loud. What genre's do you like?
Is this correct - can you elaborate a bit. It hard to make a suggestion as it is not clear why you think Final Sound and MBL are the best speakers out there (for you)