Philips PET1000 10.2-Inch Portable DVD Player
Highly recommend
I purchased this about 3 weeks ago after doing a great deal of reseach on portable DVD players.  So far, so good.  The picture is great and the sound (a problem with a lot of portables) works well without earphones (surround sound) and great with earphones (I use the same Apple sound reduction ear phones that I use with my IPOD).  I primarily use it while on a plane and have been very pleased with the ease of operation.  They say the battery lasts 2-1/2 hours at low monitor light but I have not used it that long (it takes about 2 1/2 hours to recharge).  It's so new (mine was manufactured in June 2005) that Philips is not selling extra batteries yet, which would be required for long trips.  Also, I did get an extended warranty from Circuit City because the Philips warranty is only 90 days.  My cable/internet went out the other day, so we just watched a movie on the DVD - another good reason to have one!