I'm actually trying to bulk so this may not be much help. However, there is a ton of info on this site about all that. Run a search for "Fat Loss" and you will get lots of information.
When I was new to the board that's what I did and I got a ton of good stuff out of it.
I personally do not like the GNC protein powders. There are much better quality items out there, such as CytoSport Muscle Milk.
Also, if you want a place where you can see member's reviews of products, go to bulknutrition.com . I buy from that site and it's helpful to see the reviews before you plunk down the dinero.