MPG tested the 2020 iMac 5K 3.6 GHz Intel Core i9 10-core / 128GB / 2TB / Radeon 5700. Smart move: buy with 8GB memory, then add 64GB or 128GB OWC memory to save a ton on memory cost (same memory as 2019 iMac 5K).
My 16-page review of the 2020 iMac 5K evaluates it for its real-world value versus two existing Macs that I already own, the 2019 iMac 5K (my travel Mac), and the 2019 Mac Pro (my desktop when at home).
This review is heavily focused on photographers and their use cases.
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