I haven't Built a computer In a while, could use some suggestions.

I have not looked at PC parts in 4 years so I am rather rusty I must say. my dad needs a computer to run 3 monitors so I am giving him my current rig and buying a new one. I'm going to reuse the sound card, my two hard drives, optical drive, and OS. I'm from Canada so I'm going to look where I can find the parts cheapest or with the best warranty, but I would like your opinions first. I would like to use this computer for heavy gaming and HD video editing. here is my current build.

PCPartPicker part list: http://pcpartpicker.com/ca/p/wcmA
Price breakdown by merchant: http://pcpartpicker.com/ca/p/wcmA/by_merchant/
Benchmarks: http://pcpartpicker.com/ca/p/wcmA/benchmarks/

CPU: Intel Core i7-3770K 3.5GHz Quad-Core Processor ($319.79 @ DirectCanada)
CPU Cooler: Zalman CNPS9700 LED Ball Bearing CPU Cooler ($21.63 @ NCIX)
Motherboard: Asus SABERTOOTH Z77 ATX LGA1155 Motherboard ($224.79 @ DirectCanada)
Memory: G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1600 Memory ($41.74 @ DirectCanada)
Memory: G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1600 Memory ($41.74 @ DirectCanada)
Storage: Sandisk Extreme 240GB 2.5" Solid State Disk ($184.99 @ Computer Valley)
Video Card: EVGA GeForce GTX 690 4GB Video Card ($995.09 @ Amazon Canada)
Case: Corsair Vengeance C70 (Black) ATX Mid Tower Case ($101.30 @ DirectCanada)
Power Supply: Corsair Professional Gold 750W 80 PLUS Gold Certified ATX12V / EPS12V Power Supply ($169.99 @ Newegg Canada)
Total: $2101.06
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-01-06 13:51 EST-0500)

Money is not really an issue. If I have an opportunity to upgrade please don't hesitate to inform me. I'm planning for the future, so I'm wondering if I should get a bigger power supply so a few years down the road I can throw another GPU in, or should i just get a GTX 890 when that comes out?(if I need it). What are your thoughts on reusing hard drives? i have a 1TB drive I use on my for my OS and current programs and a 500GB hard drive I use for my Games. would getting a newer hard drive be safer? Also any recommendations for thermal paste, if the CPU cooler doesn't come preapplied.

 

I like most of your choices, with the exceptions of the SSD and the case.

IMHO, Sandisk, should be avoided - I have the Samsung 830 series and it is great --- http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2318705

The Corsair is also very good.

I would also look at a larger case - I have this one, and it is easy to work with, has Hotswap built in and plenty of room for expansion

http://www.computershopper.com/components/reviews/thermaltake-overseer-rx-1

Good luck!!