Hi there !
I'm using:
2.5GHz Intel Core i7
16 GB 1600 MHz DDR3
NVIDIA GeForce GT 750M 2048 MB
15-inch Retina display
Build in keyboard
A Razer mouse E-3LUE, not sure if its real one, bought it very cheap on ebay
ATH-M50 headphones "God how much I love them!!"
Playing only Dota2 works fine, need mouse pad thou...hehe.