After doing research, here's my bottom line.
LCD TV's are a mass-market, low-margin commodity, with little to choose from when it comes to reliability. CR surveyed owners of around 180,000 HDTV sets, and tabulated the frequency of repair records. Their table of results contains a disclaimer to the effect that plus-or-minus 3 "units" of difference in repair rate between brands is immaterial, and not significant.
Given that, essentially all brands fall within that plus-or-minus 3 range.
Further research has shown me that many "brands" are in fact just a label that was sold long-ago by the former owner to an obscure manufacturer. Cynically, my take is that lots of "brands" are assembled in the same few factories, probably from components supplied by even fewer manufacturers.
The choice, then, comes down to availability, features and price. And don't expect much of a warranty, or much service life.