I own the Samsung 1200, and quite frankly, it is a POS. It has trouble reading discs, and the sound in general is mediocre at best. The picture IS good when it works. Add the fact that people are complaining about their customer support (don't expect much in the way of FW updates), and I can't recommend that company to anyone.
The LG is 1.1 and 2.0 compliant, and the Sammy 5000 isn't. Frankly, if I have to buy another player, in case one of mine dies, I'll seriously look into the LG 200.