My listening room's about 4m x 3.8m. Front speakers are Mission 775e/77C1 and the surrounds are direct-radiating standmount 771e's, which are elevated to about a metre above my listening position, and are placed to the direct sides of my listenig position, pretty much in the rear-corners of the room. I sit pretty much against the back wall when listening. I'm not completely happy with the sense of front to back movement I get with multichannel soundtracks. Whilst there is direction, it at times sounds like an expansion of the stereo soundstage, rather than an actual 'surround' mix. Would elevating the height of the surround speakers help this? There's some extra space to put them 'higher' up on the walls. Or is this a symptom of having direct-radiating surround speakers? Would diffusing bipolar rears like the 77DS be better? Ideally I'd like to keep the 771e's for the surround channels for the Multichannel Music advantages. Any advice welcome . TIA Dimmy .