I went with (for around $3000):

OS: Windows 7, Professional 64-bit
Case: Antec 1100 Gamer
PSU: Corsair Modular 1050 Watt
CPU: i7 3930K (6 Cores + 6 Logical Cores)
OC: @4.5GHz, on Air with a Noctua NH-D14
Memory: 32GB Corsair Vengeance DDR3 1600MHz, CL8, Low-Profile Ram
Video: eVGA GeForce 670 GTX, 4GB Superclocked
OS Drive: OCZ Vertex3, 120GB SSD x2 Striped (Raid 0)
Storage: Seagate Barracuda, 3TB x2

You might not need the case, power supply, etc.
Also, components will be quite a bit cheaper in the USA than they are in Canada.
And if you're willing to build your own system, cheaper again.