I can only comment on your third question, and say that I think it is rare to have problems. You have to remember on a forum like this, a lot more people will post with complaints and requests for help than they will with "happy" stories.
I have a Sony Touch edition and I have never had a problem with it. El hub and I have a Sony Bravia TV, a Sony PlayStation 2, 3, and PSP, and a really old Sony DVD player. No problems with any of these.
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