Yuna, you want a DVD player not a DVD writer. Get any one of them, they'll all work fine. I have a NEC one myself on my main computer and a pioneer one on another computer and no problems with either of them. All the brands you listed are trustable.
When it comes to DVD writable drives, thats where more questions need to be answered. As far as that goes, I'd go with DVD+RW now, since the media seems to be cheaper now and looks like the major players are sticking with DVD+R.
-nerogod