If it's power you're after, ignore the Sony Xperia X and Sony Xperia XA in the company's 2016 lineup, and focus on the Sony Xperia X Performance. Like the others in the new X series, the Sony Xperia X Performance is really good at waving all the signs of a flagship phone. Underneath the hood, though, there's a mix of what you'd expect to find in a top-tier...