It might not necessarily qualify to some as a "thorough review" but the FP did compete in the VE Shootout and was rigorously calibrated by some of the best calibrators in the world (D-Nice, David McKenzie and Kevin Miller) and performed somewhat well. They tested all major factors in PQ and the Sony scored about 7's across the board. It was rated as the 2nd best LED/LCD at the show (the Samsung F8000 was ranked 1st.) Now obviously the X900 has that one spec. the F8000 doesn't but for all 'major' PQ factors the Sony is a very solid performer and one that shouldn't be sneezed at, but still has some room to improve.
So......we all know that Plasmas always win the display quality contests. The problem is - nobody asks under what conditions and how relevant are they to the way most of us watch TV. Are they all calibrated to the same lumens, ISF calibrated, gizmo processing turned off, viewed in a dim room, etc. etc. etc.??? Another words, are LCD's display strengths lowered to plasma levels before comparison?
I have several friends with Plasmas and have never remotely envied the picture quality (and that includes a 55" Kuro!) or wished that my LCD looked that good!! Never once did I consider any of my better LCD sets to have an inferior picture to the plasmas. I would bet a fair amount of coin that if you marched 10 average people into a room with a plasma and a good quality LCD, and they were both set up by knowledgeable hobbyists, that the majority of them would likely pick the LCD set due to its brighter, bolder, whiter, well saturated picture.
The drawbacks to LCD's have been well documented over the past several years and most agree now that pixel response is more than adequate to keep up with the vast majority of content. Off angle viewing contrast is legitimate but not a real concern for most people like myself who always watch the TV straight on. Black level is more than adequate with most sets if watched with a bit of ambient light. I find the black level to be quite satisfying with my 80-632U Sharp, and significantly BETTER than my last few movie outings (E.g. - Star Trek and Man of Steel). Clouds and flash-lighting are, to me, the only real concerns with some of today's LCD sets. In this regard, my 80" Sharp is PERFECT! It's also full array LED backlit as opposed to edge lit, where the lighting is much harder to control.
If I really was super impressed with Plasmas, I would have bought one or more by now. Instead I'm on my 11th LCD and will keep my 80 Incher until I get a 2nd or 3rd gen 4K set in a year or two.