I have a 5.1 system using all the speakers from B&W's CDM NT range and have been investigating moving to a 7.1 setup. This would of course require me to use a further 2 surround speakers and I've been advised (by B&W) to use another pair of their CDM SNT's. These are neither bi or dipole but full range speakers. Has anyone else got a 7.1 set-up and use they CDM NT range ? Would not using di/bi/tri pole speaker for the sides be ok? Any advice? thanks. n.