( Engaget.com ) - Just glancing at the specifications sheet, you can tell Sony's 13.3-inch VAIO VGN-SZ791N packs quite the punch for its size. After all, who wouldn't be pleased with a 2.5GHz T9300 CPU, discrete GeForce 8400M graphics, 4GB of RAM, a built-in optical drive and two whole USB ports? Still, what looks good on paper doesn't always translate into perfection on your lap, but according to a glowing review posted over at PC Mag, this is one of those cases in which it does. When benchmarked, this critter bested the highly-praised Asus U6S, Acer Ferrari 1100, Fujitsu P8010 and MacBook Air in the vast majority of tests -- heck, it even cranked out a whopping 2 frames-per-second running Crysis at high quality. All in all, this beauty managed to impress in basically every category, and with 4.5 out of 5 stars and an Editor's Choice badge, it seems that you'd be hard pressed to find a better ultraportable for $2,500.