If this build is for just gaming drop down to the i5 2500k the difference between the i5 and the i7 is very small. Plus you didnt say anything about HyperThreading apps that you use (CAD, 3D design/rendering, etc).
Thats some pretty expensive RAM you choosed, G.Skill has 8GB RAM for around $45, go with that.
PSU i would change to an Antec, XFX, PC Power & Cooling, Corsair brand name.
That's how. I'm not going to find you specific parts right now, but that's approximately how much you COULD be spending if you were looking for deals. Even if you add 20% for markup and taxes in Canada (vs US prices... and it's not that much), that's still way below your budget. On top of all that, you are going to build a $2500-$3000 dollar machine, with one gpu, to game on a 1680x1050 monitor (and I bet you'd even use vsync). It's your money man. I was just throwing that out there.
For reference, I built the entire system in my sig, including monitor and OS, for ~$1500.