Question Which PSU is enough for my build?

[Mendz_Woodcut]

I'm in the process of building an unraid server, and have finalized most of the parts, except the PSU.

• Intel i5-12600K
• ASRock Z690 PG Riptide
• Corsair Vengeance 2x16GB DDR4 RAM
• Scythe Mugen 5 Rev.C CPU Cooler
• Samsung 970 Evo Plus 1 TB M.2 SSD
• 2 x Samsung 980 Pro w/Heatsink 1 TB M.2 SSD
• 4 x 18 TB 3.5" 7200 RPM HDD

I do plan to add more HDD's and SSD's in the next 5-10 years. No plan for GPU.

PCPartPicker shows an estimated wattage of ~ 380W. So I'm guessing a 500W PSU would be good for my needs and the future?
I currently have a Seasonic FOCUS PX-550, 550W 80+ Platinum Full-Modular PSU. My server will be on 24/7. Will 550W be enough? Will it be a bottleneck as I add more drives?

Or should I get a 750W PSU? The price difference is not that big. I've also read that going overkill on a PSU is bad because the efficiency drops at low loads. I don't have much experience here, so would appreciate any help

 

[punkncat]

Power Supply Calculator - PSU Calculator | OuterVision

This calculator has worked well for me. Consider a VERY high quality unit since it will be on 24/7. I understand there to be a sticky in the PSU sub-forum with quality tiers.