Quote:
In something of a surprise move, Apple today announced the launch of updated iMacs based on Intel's Haswell processors, faster PCI Express-based flash storage options, and 802.11ac Wi-Fi.
“iMac continues to be the example that proves how beautiful, fast and fun a desktop computer can be,” said Philip Schiller, Apple’s senior vice president of Worldwide Marketing. “Inside its ultra-thin aluminum enclosure, the new iMac has the latest Intel processors, faster graphics, next generation 802.11ac Wi-Fi and faster PCIe flash storage.”
New models include:

21.5-inch
- $1299: 2.7 GHz quad-core i5 and Intel Iris Pro graphics
- $1499: 2.9 GHz quad-core Intel i5 and NVIDIA GeForce GT 750M with 1 GB video memory

27-inch
- $1799: 3.2 GHz quad-core Intel Core i5 and NVIDIA GeForce GT 755M with 1 GB video memory
- $1999: 3.4 GHz quad-core Intel Core i5 and NVIDIA GeForce GTX 775M with 2 GB video memory

All standard configurations come with 8 GB of RAM and a 1 TB traditional hard drive.


http://www.macrumors.com/2013/09/24/apple-updates-imac-with-haswell-and-faster-pcie-flash-storage/