In his column this month at iMore, Stephen writes:
The standard iMac Pro is still a lot faster than my 2015 could ever be, but then I started looking at a fully loaded 2017 5K iMac. If I opted for third-party RAM, I could pick up a 4.2GHz i7 iMac with a 1TB SSD for $3,099. With this iMac, I would still have a noticeably faster machine on my desk, but with a lot more cash in the bank.
I decided to take the conservative route, so I ordered the regular iMac. It showed up the day after Christmas. I slapped 32GB of OWC RAM in it — for a total of 40GB — and migrated my data from my trusty 2015 model.
Unfortunately, it didn't take long to realize that I had made a mistake. Even during the migration, I could hear the new iMac's fan blowing, and once I was logged in, it was even louder.