Dude.. If you are aiming 3D TV for gaming, just blindly ignore it COZ when u continuously play games you will start having headache's. Yes active may be good for occasional 3D watchers not good for gamers.
FOR GAMERS PASSIVE 3D IS THE RIGHT CHOICE.
WHY DO YOU EVEN CONSIDER BUYING LAST YEAR TV MODELS?
They may be good but latest is always best. This year TV lineup has some cool features like NFC etc..
Mate,Have you even tested the 3D of the HX850?
The reason people suggest passive over active is due to the flicker in the active 3D Glasses.
The active 3D Glasses with HX850 have no flicker at all. This is what is most amazing about it.
Next, The 2D to 3D Conversion is also great.
Next, The beautiful Monolithic design and amazing features.
Lastly, No comparison when it comes to PQ.
So the choice is quite clear.