This year's iteration of VIZIO's top of the line XVT LCDs (at least until the XVT3D -- née XVT Pro -- series hits in Q4) are finally ready to ship and, as we've come to expect, pack a long list of features to go along with their price tags. The 240Hz 42-, 47-, and 55-inch versions all feature LED backlighting, which may be ready to beat criticisms of of light black levels with a cl
