Having read everything above...
Plasma doesn't cost that much more (these days) to operate year to year. Especially, not so much more to justify the price tag of large LCDs with good image quality. Cost to performance ratio is pretty high on a model like the 65ST50.
Plasmas can have an anti-glare film which solves your windows concern.
I am a video gamer, and (big surprise coming next...) a little more satisfied by plasma PQ/refresh. Set the TV for game mode on gaming input and ask your kids to turn the TV off when not using it.
If your kids throw a controller and hit the TV, nothing saves you. Gorilla glass Sony's will still crack the panel and I've seen it happen once. Gorilla glass may not scratch or break easily, but it also gives to pressure. You can push with your finger hard enough to move the LCD surface. Another note to the above, the Sharp Elite has a little glare. Ive noticed all TVs of decent PQ have a glossy finish.
I would suggest a 65ST50 or a 70" Sharp LE845. Sharp is very well priced for what they offer and the 70" TV is not that bad. If the decision on a TV isn't meaningful enough for you to try to convince the other half to accept a plasma get the Sharp.
AVR: Marantz 7008 Phono: Pro-Ject Debut III Speakers: BW CMC2 + 2xCM9 + Energy 2xCB-10 (rear)
TV: Panasonic 65ZT60