We did the math and you could buy 12 years worth of dlp backlights and the tv would still be cheaper than a high end non-3d model of similar size. Also the bulbs used to be $400 each so it's possible they would get even cheaper. I had no issue with the color/brightness. I think only videophiles care about that. The only problem with the tv my wife's stepdad bought is that it had a "sharpen" mode on by default which made sd tv look terrible and motionblurred. Turning off that feature fixed it.
To my knowledge the newest hdmi standard will have a pin for a 3d signal. I think right now you have to turn your tv into 3d mode using a menu but I never tried it. The pin would be used for syncing/turning on 3d automatically. The current form of 3d should be supported on newer devices.