I had the Envy for 11months and then I had screen issues. Now that I'm overseas, my Envy has collected dust for months. The envy line is expensive, so you might want to look at a different line.
For demanding games you need to spend a lot on a laptop or you'll be playing at Low settings and getting so so fps.
If I wanted gaming I'd probably go for something like this ($800+) with a midrange card:http://www.sagernotebook.com/index.php?page=product_customed&model_name=NP3265
Bottom line is: Don't expect good gaming (Skyrim) on a $500 laptop.