Online Resourcesdpreview provides the best source for camera and lens reviews, along with lots of other useful information including a popular forum.
http://www.dpreview.com/B&H Photo is the most trustworthy online photo retailer. They typically have the lowest prices. If you find prices lower than B&H be cautious. In general I recommend purchasing from a local retailer because you get to see and hold the item prior to purchase and you don't have to deal with shipping for returns. Some local retailers will price match B&H with 2 day shipping.
http://www.bhphotovideo.com/Lens reviews can be found on these websites. Keep in mind that stats are not comparable between APS, FF or brands.
http://www.photozone.de/Reviews/overviewhttp://www.the-digital-picture.com/http://www.slrgear.com/reviews/index.phphttp://www.fredmiranda.com/reviews/
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