Thanks for the replies. The main reason for my question was this:
I am considering three 50" models as shown:
LN5400 - Direct lit - costs 1099$
LN5700 - LED - costs 1299$
LN5710 - Direct lit - costs 849$
The text in bold is a verbatim copy-paste from the specs as shown in the website.
Now If I assume that all three of them indicate same kind of back lighting, i.e. non-edge full array, I can't explain why the 5710 is cheaper than the 5700 since the 5710 is a newer model (except that it does not have in-built Wi-Fi).
Am I missing anything ?
Also, are these TVs good for gaming?
Thanks for your answers! I appreciate you taking the time out to do this.