Suggestions for Gaming Build 2019? (<=$2000 CAD)

So, I told my younger brother that if he bought the parts I'd put the system together for him, but I'm having a heck of a time figuring out something that falls within his budget ($2000 Canadian Dollars or less).

In terms of general details:
Country: Canada
Stores: Memory Express or Amazon.ca please. (Memex best)
Budget: $2000 max
OS: Maybe? Assume no for now. It depends on if I can move over the copy he has, and if not I'll figure something out.
Peripherals: Do not include

Things presently owned:
1TB SSD (From old sys; fairly new)

Purpose: So he plays a lot of triple AAA games. Presently, I believe the most taxing he's playing are the newest COD and GTA V, but he'll probably keep up with this as time goes on. He told me he doesn't care about playing on much higher than 1080p, but might be seeking to add a second monitor (separate from this project).

As with most gaming systems, he'd be aiming for fairly high->max specs and solid framerates. I don't think he'd care about ray-tracing, but he's basically just looking for a powerful card that'll support his goals for some time into the future.

Restrictions:
The case he'd be aiming for is an ATX. I unfortunately lost the paper where he gave me the details, but I'm pretty sure it's this one, or very similar. It's one of TT's RGB style cases, anyhow:
https://www.memoryexpress.com/Products/MX68491

Wintel/Nvidia please, unless there's a VERY compelling case to do otherwise.


I appreciate the help! If it it seems like it's just a stock problem, let me know - he's prepared to wait and I'd really like to try and keep the Amazon purchases to a minimum if possible.
 
I would suggest this :
PCPartPicker part list / Price breakdown by merchant

CPU: Intel - Core i7-8700K 3.7 GHz 6-Core Processor ($498.75 @ Vuugo)
CPU Cooler: Cooler Master - MasterLiquid ML240R RGB 66.7 CFM Liquid CPU Cooler ($134.99 @ Amazon Canada)
Motherboard: ASRock - Z390 Extreme4 ATX LGA1151 Motherboard ($219.99 @ Newegg Canada)
Memory: Team - T-Force Delta RGB 16 GB (2 x 8 GB) DDR4-3000 Memory ($139.99 @ Newegg Canada)
Video Card: Gigabyte - GeForce RTX 2070 8 GB GAMING 8G Video Card ($685.00 @ Amazon Canada)
Case: Lian-Li - LANCOOL ONE DIGITAL ATX Mid Tower Case ($137.99 @ Newegg Canada)
Power Supply: EVGA - SuperNOVA G2 650 W 80+ Gold Certified Fully-Modular ATX Power Supply ($99.99 @ Amazon Canada)
Case Fan: Cooler Master - MasterFan Pro 120 Air Flow RGB 48.8 CFM 120mm Fan ($24.99 @ Amazon Canada)
Case Fan: Noctua - NF-P12 redux-1700 PWM 70.75 CFM 120mm Fan ($17.95 @ Amazon Canada)
Total: $1959.64
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2019-01-11 05:34 EST-0500
 
PCPartPicker part list / Price breakdown by merchant

CPU: Intel - Core i7-8700K 3.7 GHz 6-Core Processor ($489.99 @ Powertop)
CPU Cooler: Noctua - NH-D15 82.5 CFM CPU Cooler ($104.99 @ Newegg Canada)
Motherboard: MSI - Z370 GAMING PLUS ATX LGA1151 Motherboard ($149.00 @ Canada Computers)
Memory: G.Skill - Ripjaws V Series 16 GB (2 x 8 GB) DDR4-3000 Memory ($147.99 @ Newegg Canada)
Video Card: Asus - GeForce RTX 2070 8 GB Video Card ($799.00 @ Canada Computers)
Case: Lian-Li - LANCOOL ONE DIGITAL ATX Mid Tower Case ($137.99 @ Newegg Canada)
Power Supply: EVGA - SuperNOVA G2 750 W 80+ Gold Certified Fully-Modular ATX Power Supply ($109.99 @ Amazon Canada)
Case Fan: Noctua - NF-S12A PWM chromax.black.swap 63.27 CFM 120mm Fan
Total: $1938.95
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2019-01-11 12:14 EST-0500