Need recommendation for a laptop cooler
 

I am going to get a 15.6 inch gaming laptop. I heard that it generates a lot of heat, so I am thinking of buying a laptop cooler. Which one would you recommend?

I’ve heard some good stuff about the Zalman Notebook Cooler ZM-NC2000. Is it a good choice?
Here’s a link:
Amazon.com: Notebook Cooler, Silver, ZM-NC2000: Electronics: Reviews, Prices & more

One of the things that I'm looking for is that it's not too slanted, since I hate typing on slanted keyboards.

If I don’t get the laptop cooler, could the heat damage laptop components, or is it nothing to worry about?

Thanks.