This is my configuration:
3.3GHz 6-core 10th-generation Intel Core i5 processor
8GB 2666MHz DDR4 memory
1TB SSD storage
Radeon Pro 5300 with 4GB of GDDR6 memory
Retina 5K 5120-by-2880 P3 display with True Tone
In other words, the cheapest 27" with 1TB SSD.
Taking the top model would probably be a better deal, but I already think my iMac is overpriced enough and paying extra for longevity doesn’t make much sense to me, since its longevity won’t be great anyway. I’m not a power user though so I likely won’t notice much difference.
Given the ARM announcement I’m not very excited about my new computer, but I use dual boot a lot and I don’t want to buy two computers. So I hope it will last at least a few years. Perhaps I will keep using it just for Windows after I buy an ARM iMac in a couple of years.
I will get more RAM, but I didn’t decide which one to buy yet. I actually don’t really need more RAM urgently, but given how cheap RAM is (well, when you’re used to Apple prices like me), I will probably get 32GB anyway so I have 40GB in total.