The point would be that there is a very limited number of headphones with Bluetooth built-in. If you have a favourite headphone already, and the only thing it lacks is Bluetooth, then the receiver would let you add that functionality to an otherwise perfect solution.
The MM 550 Travel are very comfortable, circumaural headphones. They may not be as large as the HD 650 or HD 800 but they'll provide you with a nice, snug fit and won't fall off easily. Personally, I prefer them to the MM 450 Travel
1- The only reason I did not want the "around ear" ones is that I supposed it would be uncomfortable when layed on a bed making calls on skype... maybe I'm wrong with this? I've never tried any. If it happens to be as comfortable as any other smaller sets, I'd be more than happy to buy one. Do you have any idea ?
2- I see that the MM 550 is'nt as big as many other "around the ear" units, Do you think this would still be comfortable layed on a bed with this, or would it be to cumbersome?