CNET did not review the Sharp LC-60LE831U, but we did review a similar TV, the LC-60LE830U.
According to the manufacturer the only differences between the two are that Best Buy's LC-60LE831U lacks Quad Pixel Plus and IP Control features, and that the dynamic contrast ratio specification on the 831U is 5,000,000:1, compared with the 830U's 6,000,000:1.
We don't expect the difference in contrast ratio specification to have a major impact on picture quality, but we can't say for sure since we haven't tested the 831. See specifications to ignore from our TV buying guide for details.
For more information, check out our full review of the Sharp Aquos Quattron LC-60LE830U.