[hi-revs]

I don't know too too much about tv's, especially the technology in today's new stuff. So I've got a few questions I want to ask here before stepping into a store and having the sales person harass me about extended warranty.

I dont have any brand preference really.
It'll be 65"+
Don't need 3D capabilities.
Will mostly be used for watching tv/movies
Occasional gaming. But I don't play anything with crazy graphics. Think NHL type games
It will be wall mounted if it makes a difference

Questions-
1. 120hz vs 240hz. Will it be THAT big of a difference considering the price gap is quite substantial.
2. Is the extended warranty needed? Will the tv crap out in 3yrs? We'll be watching no more than 4, or even 5hrs a day.
3. Is it worth it to buy from openbox.ca? Their prices are cheap. But is it worth it to buy a tv that was a demo? Does it significantly impact longevity?
4. LED vs LCD? What's the better option?

If you're able, please suggest a tv for me.

Budget- not looking for a state-of-the-art $6k tv
Realistically, less than $4k. $3k would be even better.

Thanks