We have a pair of mid tier 2020 27" Intel iMacs.
Both are everything we wanted them to be and have had absolutely no problems. Both are on Sonoma and operating beautifully. They are fabulous machines with 512 GB drives and 16GB RAM.
But, we bought them new and at the time that was, and still is for us, a very good solution. For the things my wife and I do, 27" Retina screens are simply unequaled in performance at the price point we paid.
If I were looking for different Macs, I don't think we'd choose the 2020 27" models now. Time marches on and the future for Macs is Apple silicone and I can definitely live with that. But the way we work upgrades is to always keep the best operating "old" Mac. So our plan will have us at least one 27" iMac until about 2030 or more likely until it just simply dies.