HP this morning revived its sleeping Envy label for two new systems targeted at the same slim but high-speed designs as the MacBook Pro. The Envy 13 and 15 are both housed in aluminum-and-black shells and drop the usual optical drive to shed weight and thickness: the 13-inch model is relatively light at just over 3.7 pounds and is 0.8 inches thick, while even the larger 15-inch system is slightly over 5.1 pounds and under an inch. Both also draw on Monster's Beats PC audio to produce better built-in audio than most notebooks, get color accurate displays, and have a