I would go for something like this:
PCPartPicker part list:
https://pcpartpicker.com/list/zBtw29
Price breakdown by merchant:
https://pcpartpicker.com/list/zBtw29/by_merchant/
CPU: AMD - Ryzen 5 2600 3.4 GHz 6-Core Processor ($164.89 @ OutletPC)
Motherboard: ASRock - B450M PRO4 Micro ATX AM4 Motherboard ($83.98 @ Newegg)
Memory: G.Skill - Aegis 16 GB (2 x 8 GB) DDR4-3000 Memory ($79.99 @ Newegg)
Case: Thermaltake - Core G21 Tempered Glass Edition ATX Mid Tower Case ($43.45 @ Newegg)
Power Supply: Antec - EDGE 650 W 80+ Gold Certified Fully-Modular ATX Power Supply ($49.99 @ Newegg)
Case Fan: ARCTIC - F14 Silent 46 CFM 140mm Fan ($7.99 @ Amazon)
Case Fan: ARCTIC - F14 Silent 46 CFM 140mm Fan ($7.99 @ Amazon)
Case Fan: ARCTIC - F14 Silent 46 CFM 140mm Fan ($7.99 @ Amazon)
Base Total: $477.29
Mail-in Rebates: -$45.00
Shipping: $13.98
Total: $446.27
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2019-03-11 10:42 EDT-0400
Pretty good deals on that case and PSU with the rebates...