I would go with the 2600 over the 9600k. While the 9600k will get about 5-10% better fps in games, the 2600 comes with a good stock cooler and is a good bit cheaper. You dont need the Noctua NH-L9i as this is a low profile cooler that is designed to fit into small cases. Your case is a mid-tower case and will support better coolers. But if you go with the 2600, it comes with a stock cooler and it wont be needed.
I would also save a little money and go with a SATA SSD with a bigger size. For gaming performance, there will be no real world difference between a NVMe drive and a SATA SSD. But you can double your capacity for the same price with a SATA SSD vs the NVMe SSD. NVMe really shine in large data transfers across drives. But one 240gb drive will not be able to move large amounts of data across drives anyway. So there really is no point in a NVMe drive that small.
I would go with this without knowing your location.
PCPartPicker Part List:
https://pcpartpicker.com/list/zTWp6s
CPU: AMD - Ryzen 5 2600 3.4 GHz 6-Core Processor ($164.89 @ OutletPC)
Motherboard: ASRock - B450 Pro4 ATX AM4 Motherboard ($79.89 @ OutletPC)
Memory: Corsair - Vengeance LPX 16 GB (2 x 8 GB) DDR4-3000 Memory ($82.99 @ Amazon)
Storage: Crucial - MX500 500 GB 2.5" Solid State Drive ($69.85 @ OutletPC)
Storage: Seagate - Barracuda 2 TB 3.5" 7200RPM Internal Hard Drive ($54.99 @ Newegg Business)
Video Card: Gigabyte - GeForce RTX 2060 6 GB WINDFORCE OC Video Card ($359.99 @ Amazon)
Case: Corsair - Carbide Series 275R (White w/Tempered Glass) ATX Mid Tower Case ($79.99 @ Amazon)
Power Supply: Corsair - RMx (2018) 650 W 80+ Gold Certified Fully-Modular ATX Power Supply ($73.98 @ Newegg)
Case Fan: Corsair - LL120RGB LED (Three Fans With Lighting Node PRO) 43.25 CFM 120mm Fans ($98.36 @ OutletPC)
Monitor: Acer - XZ350CU bmijphz 35.0" 2560x1080 144 Hz Monitor ($529.99 @ Newegg)
Keyboard: Corsair - K70 RGB MK.2 Wired Gaming Keyboard ($129.99 @ Corsair)
Total: $1724.91
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2019-04-29 11:45 EDT-0400