As great as the 6T's are, I'd keep it the way it is if I were you.  Reasons:

-I'm always a big fan of a dedicated sub for music.

-You're already in an acoustic nightmare with your speaker placement, particularly your sub.

-The size of the 6T's are no joke.  They're HUGE speakers.  In a small room, it would be messy trying to get them to fit well.