Really bowled over by 3D. This set also just plays 3D mkv straight from a HDD too, another huge bonus. I no longer need my media player. It's completely defunct.
The .mkv from a HDD is great. I've found SBS to be as good as the .iso files. The only issue is true HD Audio through USB, but depends if you have the amp or will even notice it.
Not sure what HDD you use, but stick to a posted one. I tried using a USB powered one, and the files kept juddering as the 12GB+ movies were too large for the HDD to handle.
Have you noticed, or suffered from any flickering from the glasses? Losing sync for a split second?
As for 3D, it's better than the cinema.