In the “nice to have” column is support for refresh rates higher than 60Hz, but there’s a catch to this. Many HDTVs that support 120Hz or higher don’t accept 120Hz inputs; they take a 60Hz signal and convert it into higher rates via interpolation, a messy process suited to video playback but disastrous for PC and gaming applications. This is another hidden spec that requires a little online or hands-on research to uncover, so check carefully beforehand and make sure the return policies for your pick aren’t too onerous; you may find yourself back at the checkout. One tip: HDTVs that support 3D are a good place to start, since they often support 120Hz.