Well, if you can afford that, that's awesome but I really do think you could cut down on a couple things and lose little to no performance at all. Like ice has said I think you should also go with the E6600 for the same reasons, and since your buying from Canada Computers I would recommended this memory from OCZ
It's still as fast, 2GB, good quality with OCZ and it's a bit cheaper. Also, if you've read the stickied power supply thread in the power supply section, I don't think your going to need 850W to power your beast, I would go with Corsair's 620W or OCZ's GameXStream 600W; both have enough wattage 12V rail ratings and will suffice more then enough.
The rest of the components look great. Again, I'm just trying to help you save a bit of money buy not buying somewhat "unneccesarily"
expensive components. Looks like it's going to be one heck of a rig.