Stacey Widlitz, a retail analyst at Pali Research, calls RadioShack's vital wireless business "a disaster, " given the rough competition of direct sellers.

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"Best Buy is certainly the blue-chip of the consumer electronics big-box players, " says Stacey Widlitz, senior equity analyst at SG Cowen, The company recently expanded northward, opening eight new Best Buy stores early this year in Ontario, Canada.

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