Here's the system I ultimately ordered.
I stuck with the 850W PSU because it's plenty for this system and I don't plan on upgrading the graphics card. The 3080 should be great for years and the 3090 is only fractionally better for a much higher price.
After several weeks of vacillation I decided to forgo liquid cooling for some good Corsair fans. This dropped the price by more than $500! It also no doubt saved me some PitA maintenance.
My current system has a 500G SSD and a 3TB HDD. After 2.5 years neither drive is anywhere near full. I've known about RAID for years but never tried it. RAID 0 combined with dual SSD's should make for some blazingly fast load times! I don't have any plans to keep anything irreplaceable on the drives so it won't be the end of the world if one dies prematurely.
The price came to $2,997 after 10% discount.
Chassis
Chassis Model: Digital Storm Velox
Core Components
Processor: Intel Core i9-10850K (5.2 GHz Turbo) (20-Thread) (10-Core) 3.6 GHz
Motherboard: ASUS TUF GAMING Z490-PLUS / MSI MPG Z490 GAMING EDGE (Intel Z490) (Up to 3x PCI-E) (No SLI)
System Memory: 32GB DDR4 3200MHz Digital Storm Performance Series
Power Supply: 850W Digital Storm Performance Series (Modular) (80 Plus Gold)
Storage / Connectivity
Storage Set 1: 1x SSD (1TB Samsung 860 EVO)
Storage Set 2: 1x SSD (1TB Samsung 860 EVO)
RAID Config: RAID 0: Striping: Performance, But No Data Fault Tolerance (Requires 2 Identical HDDs)
Internet Access: Wireless PCI-E (Supports 802.11ac)
Graphics / Multimedia
Graphics Card(s): 1x GeForce RTX 3080 10GB (Performance Edition) (VR Ready)
Sound Card: Integrated Motherboard Audio
Digital Storm Engineering
Extreme Cooling: H20: Stage 2: Digital Storm Vortex Liquid CPU Cooler (Dual Fan) (Fully Sealed + No Maintenance)
HydroLux Tubing Style: - Not Applicable, I do not have a custom HydroLux liquid cooling system selected
HydroLux Fluid Color: - Not Applicable, I do not have a custom HydroLux liquid cooling system selected
Cable Management: Premium Cable Management (Strategically Routed & Organized for Airflow)
Chassis Fans: Corsair LL Series (RGB Fans) (Software Controlled Effects)