You'll flip for the Dell XPS 12 (2013) -- literally. Thanks to its unique, flipable 12-inch display makes it a cinch to change from laptop to tablet mode. Made of black carbon fiber and lined with precision-cut aluminum, the 3.2-pound Dell XPS 12 is a pleasure to use. Plus the 1.6-GHz Haswell Core i5-4200U processor with 4GB of RAM and a 128GB SSD led this machine to solid performance on our benchmarks. We particularly appreciated getting 9 hours and 24 minutes of battery endurance.