Toshiba\'s Ultrabook will make one of its first appearances at Best Buy for $899, undercutting Apple\'s 13.3-inch MacBook Air by several hundred dollars.The super-skinny 0.6-inch thick Z835 is slated to be sold exclusively at Best Buy for $899, according to Laptop Magazine.Toshiba Portege Z835: That configuration includes a 1366x768 glossy display, magnesium casing, a 1.4GHz Core i3 processor (with Intel HD 3000 graphics), 4GB of memory, an SD card slot, HDMI output, a VGA ports, a USB 3.0 port, and a 128GB solid-state drive. All at only 2.45 pounds.Apple MacBook Air: By comparison, Apple\'s least expensive 13.3-inch MacBook Air is priced at $1,299 with a 1440x900 display, aluminum casing, a Core i5 processor (with Intel HD 3000 graphics), 4GB of memory, Thunderbolt port, USB 2.0 ports, SD card slot, and a 128GB SSD. The Air weighs 2.96 pounds.The Toshiba Z835 isn\'t the first $899 Windows Ultrabook on the block, though. Acer announced its Aspire S3 in October for $899.