1 x Cooler Master - Cosmos S Silent Full Tower ( $249.95 )
1 x Intel - Core™2 Quad Processor Q9550 2.83GHz w/ 12MB Cache ( $344.95 )
1 x Scythe - Ninja 2 CPU Cooler ( $49.95 )
1 x Gigabyte - GA-EP45-DS3R w/ DualDDR2 1200, 7.1 Audio, Dual GB Lan, 1394, PCI-E x16 CrossFireX ( $159.95 )
1 x Mushkin - EM2-6400 Enhanced DDR2 SDRAM, 4GB Dual Pack (2 x 2GB) ( $84.95 )
3 x Western Digital - 640GB Caviar SE16 7200rpm SATA II w/ 16MB Cache ( $239.85 )
1 x Western Digital - VelociRaptor 300GB 10,000 RPM SATAII w/ 16MB Cache ( $329.95 )
1 x Samsung - SH-S223Q 22X SpeedPlus™ Serial ATA Internal DVD-Writer, Black ( $29.95 )
1 x LG - Super Multi Security DVD Writer 20x DVD +/-RW Dual-Layer, Black (OEM) ( $29.95 )
1 x Corsair - TX 750W Power Supply w/ 140mm Fan ( $114.95 )
1 x Assemble - Assemble Hardware + Load my O/S ( $70.00 )
1 x Microsoft - Windows Vista Home Premium x64 (64-bit) DVD w/ SP1, OEM, 1-Pack ( $129.95 )
1 x VisionTek - Radeon HD4870 X2 2GB GDDR5 PCI-E w/ Dual DVI, HDTV-Out HDMI ( $579.95 )
Total $2414. With 5% GST it's $2530 or something. No clue if you guys even have PST in Alberta, do you? in Ontario that's another 8%.
If you meant $2400 after taxes, remove the Scythe Ninja or some of the hard disks. You could also do the assembly or at least the Windows install yourself to save cash. Or get a much cheaper case like the CoolerMaster 690. Remove the Ninja if you won't overclock.
Remove some of the disks if you don't need that much room. There may be better RAM there, I just was too lazy to inspect them all.