Increased my budget to 65K for speakers. Now considering KEF C1, C3, C6 and C4 sub. Auditioned them at Profx. Liked them. Does any one has idea about reliability of C4 KEF subwoofer. IMO the bass was being overdone by the sub. Also tried the set up with polk audio PSW 110 sub, which was very soothing. Auditioned them with yamaha 477. And movie clip was of Transformer-Age of Extinction wherein galvatron takes on Optimus prime for the first time. So if any one can throw some light on reliability of KEF speakers and subwoofer. Thanks in advance.