I was surprised that the HX900 looked better than the LED rgb as well. It's almost like they were using different sources, even though I know it's the same. I wonder if the settings were adjusted for either set, or the comparison was just straight out of the factory.
Either way, the HX900 looks like a very impressive display. Makes me quite excited about getting an HX701 in the coming weeks, hopefully the HX700 series holds up as well despite being two notches down the ladder. I tried to get Sony to hook me up with an HX900 (SXRD XBR1 Sony Exchange Program), but they were having none of that. Oh well, beggars can't be choosers. The HX series from Sony look to be winners, but only time will tell. Although not as important as the main specs, aesthetically speaking I love the monolithic design from the HX700 and HX900.