http://www.pricewatch.com/

The best prices for hardware

http://www.anandtech.com/

Good hardware review

http://www.tomshardware.com/

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http://www.sharkyextreme.com/

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http://www.theregister.co.uk/

Good hardware rumors

http://www.theinquirer.net/

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http://www.microsoft.com/

http://www.ntcompatible.com/

Good windows NT stuff

http://www.electic.com/

Good hardware review