Linksys WRT350N Wireless-N Gigabit Router with Storage Link

http://www.linksys.com/servlet/Satellite?c=L_Product_C2&childpagename=US%2FLayout&cid=1162354643512&pagename=Linksys%2FCommon%2FVisitorWrapper&lid=4351239789B04

Linksys WRT350N Wireless-N Gigabit Gaming Router

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Linksys WRT350N 多了一個usb其他是乎都一樣，不知道規格有差嗎？報價要$7875(含稅) 不知哪可以買到更便宜？謝謝！