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LOL I've been looking at this for over an hour now. I'm thinking
http://www.amazon.com/Samsung-LNT5265F-1...3905&sr=1-7
or
http://www.amazon.com/Samsung-LNT4669-10...905&sr=1-24
The 46 has the 120hz thing and a better contrast ratio but I'm not sure I'll be able to tell the difference. And the 52 is a 52!! so I'm leaning that way. I'm getting my parents one for christmas and I'm just going to get myself the same thing at the same time. I'm really psyched cause I know they will love it but want to make sure to get good ones. These prices look great compared to the stores. enough rambling thanks for your help thac/guys.
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Check out AVS Forums - bunch of videophiles who will lead you in the right direction.
From my research when buying mine (and some recent conversations with a buddy in the market) - the most important thing is really contrast ratio. That's what the eye will notice more than 1080 v 720 which is more of a marketing ploy than anything. IIRC - 720s actually better in some case depending on how much standard def tv you watch (though the chip is also really important in this case).
It's a big purchase so take a couple hours to check out those forums if you haven't already.