Thanks to its Intel 2.5-GHz Core 2 Duo T9300 CPU and its nVidia 8400GS graphics card, the Sony VAIO VGN-SZ91N smoked our WorldBench 6 performance tests with a score of 94. Aside from strong performance, this laptop has several likable features. Two customizable shortcut buttons sit at the top of the keyboard. You can use them to call up a number of useful functions--multiple monitor mode, hibernate, brightness adjustment, or a snapshot look at key notebook functions, for example. Check Latest Prices.