Got MLK 165, want to add either another Component/or Coaxial..

Been looking at different pro set up's and so far have seen setups go 50/50 either way.

The only thing is that the 2nd component set will be Boston Z6's, I have no clue on how it will sound?
Did anybody ever hear 2 non matching component sets playing?
And if you wondering why they are different its because I got em in my garage and dont want to spend another 800$ on matching mlk's lol, Unless its blow your mind crazy difference lol

Or am I better off just getting Hertz Coaxial?