Rob's build suggestions

Motherboards
Gigabyte GA-X99-UD5 WIFI EATX
$249 @ Amazon
https://pcpartpicker.com/product/VKFPxr/gigabyte-motherboard-gax99ud5wifi
Asus Rampage V
$514 @ Newegg
https://pcpartpicker.com/product/hDqbt6/asus-rampage-v-edition-10-eatx-lga2011-3-motherboard-rampage-v-edition-10

Ram
G.Skill Ripjaws V Series 16 GB
DDR4-2400
$60 @ Newegg
https://pcpartpicker.com/product/4vWrxr/gskill-memory-f42400c15d16gvr

Arctic Silver 5 HD Thermal Paste, 3.5g
$4.95 @ Amazon
https://pcpartpicker.com/product/6RrG3C/arctic-silver-thermal-paste-as535g

Cases
CoolerMaster MasterBox Pro ATX Mid Tower
RGB fans, side tempered glass
No ext. drives, 7 expansion slots
$81 @ B&H
https://pcpartpicker.com/product/hWnG3C/cooler-master-masterbox-pro-5-rgb-atx-mid-tower-case-mcy-b5p2-kwgn-01
Rosewell CULLINAN ATX Mid Tower
Blue fans, side tempered glass
No ext. drives, 3/3 internal drives, 7 expansion slots
$54.99 @ Newegg
https://pcpartpicker.com/product/88Crxr/rosewill-cullinan-atx-mid-tower-case-cullinan
Corsair Carbide Series 678C ATX Mid
Side Tempered glass
No ext. drives, 3/6 internal drives 7 expansion slots
$150 @ Newegg
Corsair 760T Black ATX Full
Acrylic side panel window, red fan lights
3 ext. 5.25" drive bays, 4/6 internal drives, 9 expansion slots
$179.99 @ Amazon
https://pcpartpicker.com/product/yLvRsY/corsair-case-760tblack
Corsair 750D ATX Full
Acrylic side panel window, red fan lights
3 ext. 5.25" drive bays, 4/6 internal drives, 9 expansion slots
$179.99 @ Corsair
https://pcpartpicker.com/product/BKW9TW/corsair-case-750d

Capture Cards
Elgato HD60Pro
Uses a PCI-e slot
$179 @ Amazon (refurbished)
https://www.amazon.com/Elgato-Game-Capture-4K60-Pro/dp/B07PT84FBL/
Elgato 4K60 Pro
Uses a PCI-e slot
$237 @ Amazon (new)
https://www.amazon.com/dp/B076ZQBN6R/
Razer Ripsaw
Uses USB3 Connection
Supports monitor passthrough
$160 @ Amazon
https://www.amazon.com/Razer-Ripsaw-Game-Streaming-Capture/dp/B07Q2X651Z