With the money you save on the TV, buy a cheap dedicated media center laptop to connect to it by HDMI. There is SO MUCH free stuff to watch that you would never need cable anyway.
Buy the cheapest you can find. They are all pretty good. 3D is an annoyance. It is the industry trying to manufacture a reason for everybody to buy a new TV
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Seems as though any of the larger sets 55-64 inches are all 3D.
bttt
Do NOT buy the cheapest you can find...you will likely be disappointed. Samsung and Sony are good. I also have a Panasonic in my camper that is pretty good. Do not buy 3D.
If you are buying larger than 32 inches I recommend 1080p. Check contrast ratio...even the low end Samsungs have 50000:1 ratios now. Some of the cheap units have contrast ratios in the 2000:1 to 3000:1 region. Also recommend 120 hz refresh, but 240 hz refresh is not needed.
You can hook up an antenna (coax) and if you have network broadcast stations available you will be amazed at the picture.
I bought a cheap internet enabled LG Blu Ray player three years ago and it's still working fine.
Buy your HDMI cables on Amazon...they are really cheap and the stores will rip you off, but do not buy the cheapest cables you find...had some issues with some of them on my Blu Ray player. Had to try two or three before I found one that would work with the player, but they were cheap enough that it didn't matter. Go ahead and order at least three so they will arrive before your tv arrives...otherwise when you buy your Blu Ray player you'll have no choice but to buy an expensive cable from the store.