Since it' a dream so why not:
Prossesor: Corei7 2670 or equal (lastes Intel CPU).
GPU: Nvidia GTX 580 (Latest nvidia card).
Ram: 8 GB
Storage: 128 GB SSD with 64 GB card
Camera: 16 MP Back with Flash and 18x optical 5 MP Front
Connectivity: Wifi abgn, 4 (5,6,...) G, Bluetooth 4 (5,6,7,...)
OS: Windows 7 Ultimate (8 if it's as good) (latest PC OS)
Screen: 7" Full HD (1920*1080) Super ultra extra mega AMOLED LCD TFT 3D (whatever letters out there).
Weight: 200 G Max.