I would pass on the Samsung. I was thinking about the same tv until I read the reviews on it. There are several reviews on the BB site where people have had trouble with the TV powering off and then not coming back on. Lots of reviews on amazon about the same issue as well. My cousin got got one at Christmas and knock on wood he hasn't had any trouble with it but, I wouldn't be surprised if he did. I don't doubt you could get it fixed under warranty but, there is going to be some down time involved and how long is it going to last before it happens again?
Don't know much about the other one, so I can't really say. It might not be any better.