Apple iMac 27-inch (Nvidia GeForce GTX 675M)

The Apple iMac 27-inch (Nvidia GeForce GTX 675M) ($3,099 direct) desktop is a powerhouse system for those who need high-octane performance. It can be upgraded to 32GB of memory and a high-end third-generation Intel Core i7 processor. When combined with speedy Flash storage, it is the kind of configuration that will excite your graphic design and scientific users, at least until the next iteration of the iMac shows up later this year (probably).

source : PCMag