These days £159 (inc. VAT, or $199.95) is not a huge price to pay for a good set of over-the-ear headphones, and that's what you'll shell out for the new Sennheiser HD 450BT. Indeed, when faced with a choice between this headset and the £250 Sennheiser MB 660 UC which I reviewed last year, you may feel the HD 450BT offers better value for money.
Sennheiser HD 450BT headset review at ZDNet