Sorry for the slow reply people normally ignore me lol, I would say no my room is roughly the same size and would seriously struggle. I don't think you have enough between the speakers to really hear/relise the benefit.
Think of a cinema if you where to sit in the middle everything would be of equal distance. I would argue that your rear speakers are still very close and have you allowed 20-50cm breathing room behind the speakers to comfortably sit in the room? What would be the real dimensions of the room once set up. eg imaginary walls starting from the speakers baffles if you get me.
But it you really want it i would seriously consider in wall speakers, dont let me put you off but. 7.1 was enough and was more of gimmick than anything. I'd prefer a properly set up impactful 5.1 over anything else. But i gave up on the AV game a few years ago putting all money into a 2 channel system and have never looked back.
If you really have the itch to upgrade i'd spend the money on a kick ass sub something that can seriously shake the walls and the sole. Or spend and have an expert come in and set the system up and calibrate it for you.
Thanks for the info - much appreciated. Unfortunately, it's not a dedicated room (it has to double up as the living room as well...) and the set up is a little off-centre. The fronts are along one wall (well in about 30-40cm as measured from the baffles) from one wall and the front pair's centres are about 2.1m apart, with the centre in the a cabinet. The sides (the MA RXFX) are perforce about 1.95 m up the side walls, behind the main seating position and the ceiling is 2.4m (give or take). There's a huge set of folding glass doors along the wall opposite the screen (3.3m long and 2m high) - so tend to close the floor length lined curtains to keep out the light and reduce the sonic reflections when watching films.
Hang on - see if the link to my system as it evolves thread is still working... It does! here
- shows the set up and the speakers,,,
... need to update this as:
1. The BDP has been upgraded
2. The amp is now the SR7009
3. The wi-fi router has changed
- rest is good though... need to update that thread (more pictures when I tidy the room).
I would like to go for a 7.1 - but not sure about speaker positioning - the glass doors prevent them being wall mounted and putting them on floor stands is a bit of a no-no with the boys and Mrs. S. Have toyed with the thought of ceiling speakers to extend to 7.1 - but that got me thinking: ceiling speakers = height speakers => Atmos/Auro 3D and that gets to this thread...