Well it is hard to compare a TV that streets for 9K vs one that can be found for less than 4K... or even 2500 dollars if you get a 2011. Having said that, fast motion on the Sharps is pretty awful. Rear projectors are rear projector LEDs are LEDs both have their strengths and weakensses. The deciding factor to me would be how bright is the room and what are you viewing habbits. If you watch a lot of daytime TV with lots of windows all around the clear screen will be problematical. The Mits needs a low stand. Really so does the Sharp but the Mits suffers more off vertical axis. I went through this process cross shopping the 80" Sharps against the Mits 92" at roughly the same pricing. I just hate the motion artifacting on the Sharps. The Sharp uses less energy, both of the them really need a good external Video Processor to get the most out of them. I have a big room with subdued lighting, the Mits was clearly the right choice for me. The 90" Sharp is above my price point but also seems like it should have Elite picture quality, possibly even be a 4k screen for th price point.
Samsung 78" JS8600, Mits WD-92840 43" Samsung 43ku7000 - Lumagen Radiance XS, Martin Logan Motion 40s, Ascend Sierra 2s
58" Panny Plasma -DVDO DUO, Usher S520, JBL HLS-610, Definitive SM45, MusicHall Marimba