Maingear gave us a quick nudge to say something was coming. Now it can reveal that -- alongside Intel's third-generation processors inside all of its desktops and laptops -- it's further updated two of its tower models. The F131 ($1,049), the middleweight option, now houses the same vertical heat-dissipating design found on Maingear's Shift model, alongside hot-swappable storage. It's followed by the Potenza ($899), the company's "mini-ITX gaming solution." It's 45 percent smaller t