I have not heard the Mythos, but I did audition the Paradigm Cinema series. I ended up choosing the Axiom W series over the Paradigm's in the end. I just liked the sound and detail of the Axiom's better. And IMHO I think any surround speaker would be hard pressed to beat the QS8's. It was actually my dissatisfaction with the Paradigm surrounds that led me to find Axiom Q series initially. Then I found the W series and the rest is history - I am a very happy and satisfied Axiom owner.

My setup - W22's, W150, QS8x4 and EP500.

Dan
On-Wall M5HP LCR, QS8 & EP500 in 7.1