From my recent experience, in a 19 x 12 room, you will not be too disappointed with the recent JVC projectors (350/750 and replacements) for a couple of years until the "next big step forward" comes along.

You only need to pay, say $5000 for a lower range model as these have pretty much the same performance as the more expensive ones. Just get it calibrated after running the lamp in for a few hours.

In the context of what you have spent on your room this seems not unreasonable and as for new technology...

- LED is not going to be around for a bit yet and may be no better than halide lamps;
- 3D? Need I say more than the thread on here;
- 4K? there is no super-HD software and is the Meridian 810 really much more impressive than my JVC?

IMO, the Runco and high-end SIM2 are expensive for the performance you get.

Malcolm