The Samsung UNB7100 series includes the 40-inch UN40B7100, the 46-inch UN46B7100 and the 55-inch UN55B7100. These HDTVs are available exclusively at electronics retailer Best Buy, while the models in the Samsung UNB7000 series are available nationwide. The only other significant difference between the two series is cosmetic; the color accents on the 7100 series are gray, as opposed to red for the 7000 series. Otherwise the two series are identical.
For more information, check out the full review of the Samsung UNB7000 series.