Thanks everyone (esp Ajax!). The room is 2.7m high (and the rear surrounds will be mounted just above door height). The dinning room is about 4m long. I hope the Axion's don't cost tooooo much to ship to Syd as most feedback seems pretty good.
Nathan

HT:M80,VP150,QS8,EP500 Outside:4xM3 Office:AudioBytes, Rumpus: M60,VP150,M22 Portable:2 x Airs