We review the 2023 iMac, which now has an M3 chip and nothing else to distinguish it from the model it replaces.
Apple 2023 iMac All-in-One Desktop Computer with M3 chip: 8-core CPU, 8-core GPU, 24-inch Retina Display, 8GB Unified Memory, 256GB SSD Storage, Matching Accessories. Works with iPhone/iPad; Pink
Mac mini (2023) M2 Pro review: an incredibly powerful desktop replacement
Apple iMac review (2023): Nothing's changed, except the M3
Apple iMac M3 (2023) Review: Beautiful but basic - Reviewed
iMac (M3, 2023) review: An all-in-one all-rounder, but some parts are ready for an upgrade
Apple's next iMac could feature M3 chip, revamped stand and new colours
M3 iMac Review After 45 Days - Avoid My Mistake!
Apple iMac M3 (2023) review: the i stands for incremental
Review: Apple IMac 24'' M3 (2023)
Apple's New M3 Chips Power Refreshed iMac, MacBook Pro 14 and 16 - CNET
iMac 24-inch M3 review: A clear sign that Intel Mac support is ending soon - Current Mac Hardware Discussions on AppleInsider Forums
Apple iMac M3 (2023) Review: Everything You Could Want in an All-in-One - CNET