A best bet is the new Apple iMac Intel Ivy Bridge Core i7 3.4GHz 27" Desktop for $2,949. In cart, it falls to $2,835.96. With $23 for shipping, that's the lowest total price we've seen for an iMac desktop with a 3TB hard drive. (It's a current low by $514.) It features an Intel Core i7-3770 3.4GHz Ivy Bridge quad-core processor, 32GB RAM, 3TB Fusion Drive, NVIDIA GeForce GTX 680MX 2GB graphics card, AirPort Extreme (802.11n), two Thunderbolt ports, FaceTime HD camera, Bluetooth 4.0, Gigabit Ethernet, Magic Mouse, wireless keyboard, and OS X Mountain Lion.
Of note, this desktop is expected to ship in six to eight weeks.