Mobo - Anything Asus or Gigabyte as long as it is compatible Core i7 and DDR3 1600MHz (by default; no OC).
RAM - 12GB DDR3 1600MHz with good timings
Case - Anything looking cool, quiet and well ventilated.
CPU - Core i7 Extreme
PSU - Anything Antec
GPU : nVidia Geforce 295 (only one)
Monitor - Huh? The one I have now is perfect (ViewSonic Optiquest Q241wb)
HDD/SSD - Intel SSD SLC. 'nuf said.
Mouse - The one I have at the moment (Logitech LX7)
Keyboard - The one I have at the moment (Logitech Media Keyboard Elite)
oh and... A BETTER DESK DAMNIT.
Soundcard : The best Creative SoundCard someone can get!
Sound sytem : 7.1 with more than 700Watt baby!