iMac

There's only one line of iMacs left – the 24" M1 iMac line.

If you are looking for a desktop Mac, but it doesn't have to be an iMac specifically, you could consider other Macs such as the Mac Mini and Mac Studio With those, you provide a separate keyboard, mouse, and display.

Whatever Mac you get, I would suggest getting at least 16 GB of RAM, even if you have to custom-order the Mac from the online Apple Store. You cannot add RAM to Apple Silicon Macs after purchase. Adobe recommends 16 GB or more of RAM for PS / LR / LRC, and you probably would want at least that to do heavy video editing.

To add to Servant of Cats's excellent response:

• Avoid the entry-level iMac 24 ("seven-core"). It has a severe shortage of ports:

including no network port unless you order the optional power supply that has a network port. The 8-core model includes the ported power supply. If you need to use an external monitor or several external storage devices, the 2-port model would be crippling.

• Just as RAM cannot be upgraded, neither can internal storage. Buy today the storage you may need in 2-3 years. I recommend no less than 512GB for home users and a minimum of 1TB for pros. We are already seeing complaints from people with 256GB SSDs who routinely do not have enough free space to install system upgrades.

the iMac 24;s are basically consumer models. Today there is no replacement for the uprated 27-inch iMac so many of us enjoy. If you can wait until Apple's fall announcements, you may see if the currently limited options improve.

One of these depending on budget…

Buy Mac - Apple