As a general rule... stay with the same series for the front sound stage. so if you are in the cm series stay with that... that is joy to say that a different series center would work just fine with the other... it is just a general rule...you could buy just one of the fronts and use it for the center.
can you try out a different center within your system? that would answer the questions
can you try out a different center within your system? that would answer the questions