not sure about the states..
90% of the dvd/brd are universal when playback of r1, r2, r4, region a and region b material..
some dvd disc's may poor replay value over hdmi due to pal and ntsc playback..
trying to force 24fps playback on a 30fps encoded disc will cause nothing but playback issues..
not sure where you are robert, stand alone players may cause no issue in multiregion discs in relation to brd and dvd playback. the oppo might be the only brd player in the states that is compatible for multiregion use within the us..
ps3 on the other may be region locked to a particular region area so play back multiregion disc's might not be possible...