Building new Server Rack (Plex QSV + NAS)

I posted this over in NAS Killer 5.0 here but it was suggested I post over here as well.

I have been using Plex on a home-built HTPC that served me well for many years and after a freak power outage it died and as much work as I have done to bring it back to life, something has possessed the box and I need to move on to something better. I have toyed with the idea of building a rack setup but have no experience with anything other than windows. After reading many posts and articles at serverbuilds.net (thank you so much for your dedication to helping us JDM_WAAAT) I have decided on a 2-box set up with plenty of room for growth. Could I do this much cheaper with prebuilt options? Sure. Do I want to? No. I’m not completely worried about the price but I will take a deal where I can find one. With that being said, below are the two builds I have planned out. The first is going to be a 2U Plex QSV build with the potential to run other services as I get comfortable with Ubuntu. The second will be a 4U NAS running Unraid.

I would love any insight, recommendations, and warnings with the parts list I provided. (Prices were approximate at the time I was researching parts)

Intel QSV HW Transcoder

Part Name Quantity Approx. Cost
Case Rosewill 2U Server Chassis RSV-Z2600U 1 $130.00
Case Fans Noctua NF-A8 PWM, Premium Quiet Fan 3 $16.00
Power Supply EVGA SuperNOVA 120-GP-0850-X1 1 $175.00
Motherboard ASROCK B460M Steel Legend 1 $142.99
Processor Intel Core i7-10700 1 $270.00
CPU Cooling Cryorig C7-47mm Tall, SFF Mini ITX CPU Heatsink 1 $68.00
Ram G.Skill RipJaws V Series 32GB (1 x 32GB) 1 $110.00
OS Hard Drive Sabrent Rocket Q 1TB NVMe PCIe M.2 1 $110.00
$1,053.99

Unraid NAS

Part Item Name Number Needed Approx Cost
Case RSV-L4500 1 $175.00
Motherboard ASRock Z97 Extreme6 1 $170.00
Processor Intel Xeon E3-1276 V3 1 $130.00
Ram Crucial Ballistix 32GB 4x 8GB 1 $110.00
Power Supply EVGA SuperNOVA 120-GP-0850-X1 1 $120.00
CPU Cooling Noctua NH-L12S 1 $54.95
Cache Drives Samsung Electronics 870 EVO 500GB 2 $70.00
unRaid USB SAMSUNG MUF-32AB/AM FIT Plus 32GB 1 $10.00
9 $909.95

Other Stuff

Part Item Name Number Needed Approx Cost
Rack StarTech.com 25U Open Frame Server Rack 1 $250.00
Rails iStarUSA TC-RAIL-26 2 $42.00
Rack Accessories Lancher 60-Pack M6 x 16mm Screws and Cage Nuts 1 $20.00
Rack Accessories StarTech.com 2U Server Rack Shelf 2 $33.00
Rack Accessories CyberPower CPS1215RMS Basic PDU 1 $55.00
Other Relper-Lineso 6 Pack 18 Inches SATA III 1 $9.00
Switch Already own
Router Already own
8 $484.00