I'm a PC gamer and I need a laptop that's decent with games?

I need a laptop for playing games. Reason I need a laptop is because my parents are divorced and I go to my dad's house every other weekend. I need mobile Power! I need a laptop that can play Minecraft well. I have an old Acer desktop From 2011. Let's just say it can't handle Minecraft very well. I do not only play Minecraft though. I play L4D2, Mirrors Edge, Portal 1 & 2, Terraria, e.c.t. I was thinking about http://www.bestbuy.com/...cp=1&lp=29 (If the link is messed up i'm sorry) Or http://www.bestbuy.com/...cp=1&lp=21
(I prefer AMD) I'm open to any computer as long as its 450 dollars or less! This is very important! I will take any other laptop as long as it isn't Toshiba. I have had many issues with Toshiba in the past and to be honest I don't like the company. Anyways thanks for helping!