Gaming laptop under 1000?

I've done some research and i really liked the lenovo ideapad y510p but i then found out its not available in australia! Anyway i want laptop pretty much as close to that as possible. The games ill mostly be playing are Minecraft, FTB, Portal and counter strike on max settings, but ill also occasionally play higher demanding games like battlefield and crysis. I also want a a backlit keyboard and no touch. 15 inch to 17 inch is fine. Battery life dosent matter too much.