Need Build Guidance - what to get? Ryzen 9 3900, RTX 3080, etc.

Hi Guys,

I am currently in the process of building a new gaming rig. I stream with Streamlabs OBS on Facebook so I want to ensure my rig is fully capable of achieving high fps @ 1440p while streaming.

Here is the current part list that I am thinking about: https://pcpartpicker.com/list/wCY9Gq

I am really struggling to decide which mobo I should get. Would something like an X570 MSI be fine, or do I need something that is higher tier?

CPU: AMD Ryzen 9 3900X

CPU Cooler: Corsair iCUE H100i RGB PRO XT 75 CFM Liquid CPU Cooler

Mobo: ?

Memory: G.Skill Ripjaws 32gb DDR4-3600

Storage: 500 gb WD m2 & 6- gb ssd samsung

Video Card: Nvidia RTX 3080

Power Supply: Cooler Master MWE Gold 750W 80+ Gold Certified Fully Modular ATX Power Supply

Monitor: Dell S2719DF 27" 2560x1440 155hz

Case: Need suggestions - looking for something of nice quality of course, with a tempered glass side and possibly some RGB.

Thanks in advance for any advice/suggestions/recommendations! Y'all rock!