[Build Ready] Looking to upgrade my ~6yr old gaming PC into something more current.

###Build Help/Ready:

Have you read the sidebar and rules? (Please do)

Yes

What is your intended use for this build? The more details the better.

• Gaming (more details below). Occasionally while streaming.
• Heavy Adobe Photoshop, Illustrator and InDesign use. Usually all 3 at the same time, Images > 9000x12000px in Photoshop.

If gaming, what kind of performance are you looking for? (Screen resolution, FPS, game settings)

• 1080p, 60fps on higher quality settings, though willing to sacrifice some quality for stable fps.

What is your budget (ballpark is okay)?

I can drop an additional ~800-1k CAD on top of the parts that I currently own. I'm flexible on the budget and would prefer to be somewhat future proofed, but I'm looking for a good cost/performance ratio.

In what country are you purchasing your parts?

Canada

PCPartPicker part list / Price breakdown by merchant

Type	Item	Price
CPU	Intel Core i5-6500 3.2GHz Quad-Core Processor	$270.98 @ DirectCanada
CPU Cooler	RAIJINTEK EREBOSS BLACK 56.5 CFM Sleeve Bearing CPU Cooler	$54.98
Motherboard	Gigabyte GA-Z170XP-SLI ATX LGA1151 Motherboard	$175.50 @ Vuugo
Memory	Crucial 16GB (2 x 8GB) DDR4-2133 Memory	$92.00 @ shopRBC
Storage	Sandisk SSD PLUS 120GB 2.5" Solid State Drive	Already Owned
Storage	Western Digital Caviar Black 2TB 3.5" 7200RPM Internal Hard Drive	Already Owned
Video Card	MSI GeForce GTX 970 4GB Twin Frozr V Video Card	Already Owned
Case	Cooler Master Storm Trooper ATX Full Tower Case	$186.50 @ Vuugo
Power Supply	Corsair Professional 750W 80+ Gold Certified Semi-Modular ATX Power Supply	Already Owned
Monitor	Acer H243Hbmid 24.0" Monitor	Already Owned
Mouse	Logitech G600 MMO Gaming Mouse Wired Laser Mouse	Already Owned
External Storage	Western Digital My Book 2TB External Hard Drive	Already Owned
External Storage	Western Digital My Book 2TB External Hard Drive	Already Owned
Prices include shipping, taxes, rebates, and discounts
Total (before mail-in rebates)	$814.96
Mail-in rebates	-$35.00
Total	$779.96
Generated by PCPartPicker 2016-03-04 15:40 EST-0500

Provide any additional details you wish below.

I'm experiencing an issue with my current build after recently upgrading my video card from a GTX 460 to the 970 listed above where the PC will sometimes just lose power and restart while playing some more graphically intense games. Seems to be a lot of reasons why that could be occurring with the PSU being suggested a lot as potentially failing. If that ends up being the case I'll need to purchase another Gold PSU.

I'm fairly inexperienced when it comes to picking parts and tried to do my best based on suggestions from the Logical Increments link in the sidebar but I'm definitely willing to be flexible on suggestions for replacements. Mostly I'm just looking for a bit of reassurance before I drop a lot of money on parts that might not be optimal for my situation.

Thanks in advance for any advice offered!