The M6 cost me 36K. The soundstage of the M6 is very impressive also the low frequency output compared to the KEF. The Polk audio sound was very boomy and gave me a headache when I auditioned it at profx. The B&W are far too expensive. The Monitor Audio BR series is better than the M6. The M6 is a recently launched model from Monitor Audio,its not a replacement for any older models