The top options in the extra-large category seem to be:
Samsung's 65" (although a rumor has that it's been pulled?)
Of those, the LG is likely to be the best combo or size and quality - they routinely earned high praise for last year's lh90 and lxh90. Samsung is likely good quality, but some comments on the c8000 imply that this model may have it's limits. Vizio has lots of praise for pricing, but sparse comments on the actual PQ that are independent of price. Sharp makes panels for Sony, but some feel the quad pixel has no inherent value and it's feature set is not as rich as the other models. Of these, I believe only the Sharp does not have 3D, and all are out around the summer (plus or minus a month or two).
Of these, I'm most excited about the LG - great reputation for PQ and great features lead me to suspect it's the winner on this list.