We were already fans of Dell’s XPS 15, but the improved performance, incredible stamina and smorgasbord of features make it more alluring than ever.If you can afford the price of admission, it puts on a spectacular show.The large 3.9 x 2.2-inch touchpad on the XPS 15 offers just the right amount of friction and smoothly executes multitouch gestures such as pinch-to-zoom. It also has two discrete mouse buttons that offer good tactile feedback.The 15.6-inch, 1920 x 1080 resolution display on the XPS 15 is one of the brightest and most colorful we’ve tested.