I would look here.
http://outlet.lenovo.com/outlet_us/l.../?page-index=1
I have been searching for a relatively good and and inexpensive gaming laptop as well and if you go to the page above and search for the Y series, they typically have some type of Y40 or 510p or even the Y50s as long as you don't mind refurbished (sometimes they even sell new ones for discounts). They go fast though and they update it literally like every hour with new laptops so check it out often. I found one Y50 on there but was too slow to purchase and it was gone!
You can check out the specs for each but the Y40 is pretty cheap and has an R9 275 which runs games pretty decently. The 510p has dual 755M in SLI which is a little better than the r9 275 but from what I hear runs a bit hotter. And then the Y50 has the nice 860M which can runs game pretty damn well for a laptop card. Just make sure you read the specs before you buy because some on the site have i5 processors and some have i7.