Sure B&W (and Focal-JMLabs, and KEF - as well as Sennheiser, Harmon/Kardon, and others) are "serious" companies, with serious marketing teams, seriously concerned with maintaining serious brand reputations.
However, another goal (THE goal) in marketing is to maximize price per product, to the Nth penny possible. Rarely do these companies turn out absolute duds, and also rarely do they turn out "giant-killers." These companies ARE the giants - the ones whose branding, design, production, distribution, and pricing are highly optimized. If these companies have hired the right people, you can bet your leather-wrapped earpads the product's value will be "good" - no better and no worse. Only the smaller companies with less regimented - or very daring - marketing operations turn out products with such skewed value propositions that they end up either "failures" or "absolute bangs-for-the-buck " or somewhere in-between.
Will the P7, or the Spirit Classic at the heart of this thread, or the next full-size cans from KEF, be "worth every penny"? You can bet your silver-wired transformers they will be - these companies are too smart for that not to happen.
But could your individual pennies be worth more if you spent them somewhere else? Well, that depends on how you evaluate your gear...