MacMall offers the Apple iMac Intel Core i5 2.9GHz 27" Desktop, model no. MD095LL/A, for $1,379.99. This $100 mail-in rebate drops it to $1,279.99. With free shipping, that's tied with last week's mention and the lowest total price we could find by $320. Features include an Intel Core i5 2.9GHz quad-core processor, 27" 2560x1440 display, 8GB RAM, 1TB hard drive, NVIDIA GeForce GTX 650M 512MB graphics card, 802.11n wireless, and OS X (Mountain Lion). Deal ends September 30.