Shopping for a new router can feel overwhelming, especially if you don’t really understand what you’re looking for. There’s lots of jargon to wrap your head around, plenty of hyperbolic claims about speed and coverage to sift through, ISP limitations to take into consideration — and that’s before you try to comprehend the newfangled features that come with emerging, next-gen Wi-Fi tech.  But there’s no need to feel paralyzed if it’s time for an upgrade. If you understand some key basics, you’ll have no problem …