How to decipher which "region free" works in 'Merica?

[polarisn1]

Hey everybody.

I quickly searched this forum, but couldn't come up with the information I needed.

Im looking at buying boxed blu ray sets in the UK for use in America. I am doing this because I went to school in the UK, and sold my textbooks for Amazon.co.uk credit. I am going back for graduation next week ( I live in Minnesota) and I recently purchased the sony BDP-S390 blu ray player and a samsung UN46EH6000 TV, and I thought I could use up the Amazon credit to buy blu ray movies over there and just bring them home with me.

I am looking at the "region free" videos of Transformers 1 and 3, X-men quadrilogy, American Pie 4 disk set, Pirates of the Caribbean 4 box set, Fast and Furious 5 disk set, and Harry Potter 8 film collection. All of these say region free, but over on the AVS forums people said that I need to look out for the discs being coded in 50fps instead of the 60fps that american technology uses.

Anyone experience this difference when buying region free discs from the UK for use in region A players? Some people cite that extras could be coded in the 50fps and therefore wont play on my american player.

How can I tell if I am truly buying a disc that everything will play on my player?

This sure is confusing if manufacturers are allowed to put "region free" on the disc if not all content will work in all areas?

Im sorry if this is a really noob question, but like I said, I tried to search with no luck.

Thanks!