I have been thinking of getting the Mordaunt short 309 sub Mordaunt short 906 for front and Mordaunt short 904 for the rear I have Yamaha DSP-AX2 amplifier with 6x140W at 8Ohm. Do you think this assembly will be good for this amplifier? BDW: The amp has the posibility to power front and back SUB and front and back center. I can hook 10 speaker up to it. Any suggestions for other speakers? Maybe i should get bigger speakers as my room is 5x6*3.7meters? Thanks in advance!