I like the sony's simple because they are fully compatible with the computer via bluetooth. The software on them can be a bit slow, and on newer models they threw any sense of user interface guidlines out with them two action buttons which thoughout use would swap from being and action to a cancel, god that was frustrating.
I did get a Samsung D500 for 70 quid BNIB from a friend who got delivered two instead of one. I was made up. But here is where Karma kicks in. Really she should have sent it back, but as I got it, within two days I had walked into a corner table and smashed the front screen. Sigh.
I am back as ever to my trusty samsung V550 which although a brick does have superb reception, so essential because I don't travel but do live and work in the sticks.