First time PC build...how does it look?

Good choices!
Only thing I would add is a CPU cooler if you plan on doing any overclocking, but great build in any case!

http://ca.pcpartpicker.com/p/3x9aP
PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($229.79 @ DirectCanada)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler ($31.79 @ DirectCanada)
Motherboard: MSI Z87-G45 Gaming ATX LGA1150 Motherboard ($159.98 @ Newegg Canada)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($79.26 @ DirectCanada)
Storage: Samsung 840 EVO 120GB 2.5" Solid State Disk ($96.94 @ DirectCanada)
Storage: Seagate Barracuda 500GB 3.5" 7200RPM Internal Hard Drive ($52.99 @ Canada Computers)
Video Card: Gigabyte Radeon R9 270X 2GB WINDFORCE Video Card ($209.99 @ NCIX)
Case: Cooler Master HAF 912 ATX Mid Tower Case ($59.99 @ Memory Express)
Power Supply: XFX 650W 80+ Bronze Certified ATX Power Supply ($79.99 @ NCIX)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer ($16.79 @ DirectCanada)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) ($109.99 @ Canada Computers)
Total: $1127.50
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-04-23 15:01 EDT-0400)

I swapped overclocking for a much better video card.

PCPartPicker part list: http://ca.pcpartpicker.com/p/3x9sO
Price breakdown by merchant: http://ca.pcpartpicker.com/p/3x9sO/by_merchant/
Benchmarks: http://ca.pcpartpicker.com/p/3x9sO/benchmarks/

CPU: Intel Core i5-4570 3.2GHz Quad-Core Processor ($214.79 @ DirectCanada)
Motherboard: ASRock B85 Pro4 ATX LGA1150 Motherboard ($78.00 @ Vuugo)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($79.26 @ DirectCanada)
Storage: A-Data Premier Pro SP900 128GB 2.5" Solid State Disk ($76.87 @ DirectCanada)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($59.99 @ Canada Computers)
Video Card: MSI Radeon R9 280 3GB TWIN FROZR Video Card ($309.99 @ NCIX)
Case: Corsair 200R ATX Mid Tower Case ($55.75 @ DirectCanada)
Power Supply: EVGA 600B 600W 80+ Bronze Certified ATX Power Supply ($49.99 @ NCIX)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer ($16.79 @ DirectCanada)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) ($109.99 @ Canada Computers)
Total: $1051.42
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-04-23 15:08 EDT-0400)





I don't know what your budget is, but if you can spend a little more-

PCPartPicker part list: http://ca.pcpartpicker.com/p/3x9y5
Price breakdown by merchant: http://ca.pcpartpicker.com/p/3x9y5/by_merchant/
Benchmarks: http://ca.pcpartpicker.com/p/3x9y5/benchmarks/

CPU: Intel Core i5-4570 3.2GHz Quad-Core Processor ($214.79 @ DirectCanada)
Motherboard: ASRock B85 Pro4 ATX LGA1150 Motherboard ($78.00 @ Vuugo)
Memory: G.Skill Ripjaws X Series 8GB (2 x 4GB) DDR3-1600 Memory ($79.26 @ DirectCanada)
Storage: A-Data Premier Pro SP900 128GB 2.5" Solid State Disk ($76.87 @ DirectCanada)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($59.99 @ Canada Computers)
Video Card: PNY GeForce GTX 770 2GB Video Card ($339.99 @ Memory Express)
Case: Corsair 200R ATX Mid Tower Case ($55.75 @ DirectCanada)
Power Supply: Antec High Current Gamer 620W 80+ Bronze Certified Semi-Modular ATX Power Supply ($79.99 @ NCIX)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer ($16.79 @ DirectCanada)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) ($109.99 @ Canada Computers)
Total: $1111.42
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-04-23 15:11 EDT-0400)

For the same price, why not throw in Samsung 840 evo at 250 gb? Well, I guess there's 400 gb missing. If you have a good internet monthly cap you could always do cloud storage.

I like the GIGABYTE GA-Z87X-HD3 over the non "x" version, if you're going with gigabyte. For the $10-15 extra, you get more usb 3.0's. You also get two extra ram slots and the ability to add another PCI E 3.0 in at 8x in addition to the PCI E 3.0 at 16x you're going to be using at the moment. Otherwise, you're stuck with a lousy PCI E 2.0 at 4x as your second. What will you use it for? Heck if I know... but I think those well worth the extra few dollars just to have those options open at PCI E and RAM.

I could go into windows 8.1 vs 7 but I won't because I don't feel like becoming angry today.

Good luck!