Apple pulled back the curtain on its latest round of iMac refreshes, and the upgrades are pretty significant — with the exception of a lack of storage improvements. First, the good news: Apple has been pretty serious about its Retina displays, and is moving to replace more of its older “only HD” models with them as time goes on. It also moves the 27-inch iMac lineup to the current generation of Intel Skylake processors, but only jumps to Broadwell on the 21.5-inch versions.

Let’s begin with the 21.5-inch model, which finally gets an update for the first time in almost two years. It gets a new Retina 4K display version with 4,096-by-2,304-pixel resolution. This model starts at $1,499 with a 3.1GHz Broadwell processor, 8GB RAM, an onboard Intel Pro Iris Graphics 6200, and a sluggish 1TB 5400 RPM hard disk. The 21.5-inch iMac without Retina continues to start at $1,099, albeit with a new 1.6GHz dual-core Intel Core i5 processor, Intel HD Graphics 6000, 8GB RAM, and a 1TB disk. The $1,299 iMac gets bumped to a 2.8GHz quad-core Core i5 and Iris Pro 6200 graphics.

Moving on to the 27-inch model, it’s Retina 5K displays, Skylake processors, and discrete AMD graphics across the board. The $1,799 base version comes with a 3.2GHz quad-core Core i5 processor, AMD Radeon R9 M380 graphics with 2GB VRAM, and 8GB RAM/1 TB hard disk. An extra $200 swaps in a faster 1TB Fusion Drive and R9 M390 graphics, also with 2GB video memory. Finally, the $2,299 config bumps the processor to 3.3GHz, the GPU to a R9 M395, and the Fusion Drive to 2TB.