Dell has often been associated with capable but often workhorse systems, but it has regularly tried to go after the premium audience dominated by Apple: the Adamo line was a clear shot across the bow of the MacBook Air, for example. It's coming back to this arena in a very different way with the XPS 15z, a 15.6-inch system that promises more of the style of a Mac (in this case the MacBook Pro) with a mainstream price. We'll gauge in our XPS 15z review whether it's successful as a Windows notebook and whether it might collect a few would-b