I'm surprised, from the reviews I've read they should blow a set of freebie phones out the water. Did you buy a heavily discounted price pair? B&O tend not to supply their goods to any other retailers. Are you sure they are real, there is a load of fakes going around especially via ebay. This would explain why a set of freebie phones sound a whole lot better.
Ok, there are not 'freebies' as such just very good supplied plugs. Sony did ( not sure if now) supply very good quality plugs.
To replace them, they are about £45/9 I'd thought I'd lost them and had to check the price.
By B&O's are not fakes I can assure you.
Yes they sound very good, but as previous peole have said, there are sonic improvements to be had using inner ear types.
They ooze quality though, and of course, if your a poser meet all the requirements I use them with nothing on