get the cheapest one you can find made in china.
they're virtually all region free and play well enough, but not so that having an HDTV will do you a scrap of good.
anyway at ~$30 it's no real loss.
I have a philips DP642 which has divx built in and that was about ~$60 and arguably a little more robust.
http://www.videohelp.com/ is the place to look for this sort of stuff.