Firstly my setup is as follows Arcam DV88 DVD and AVR100 Receiver Monitor Audio silver 9i fronts and 12i centre. I took some 3i monopole and FXi bipole speakers home over the weekend for a demo, and have come the the following (basic) conclusion... Monopoles have more bass and Bipoles sound louder.... Thats what it comes down to! I'm swaying towards the bipoles because even when I set the rears to thier highest setting, the mono's dont sound loud enough. One question though...as the frequency range for the Bipoles is 55hz to 25khz, what is the frequency range for DD and DTS for the rear speakers? Ta!