The wireless functionality tends to degrade the sound a lot in headphones, so you're always compromising a fair bit for convenience. The 'wireless' element makes up a big chunk of the price tag too. But there are obviously wireless headphones that are superior to wired ones in some instances, but it's all cost related. For example, a £200 pair of good wireless headphones are more than likely to be better than wired ones, for eg, less than £50.
If you're set on having a wireless pair though, we do like the Philips M1BTs (reviewed here: http://www.whathifi.com/review/philips-m1bt) But ultimately, wired headphones offer far better sound in general.