Digital picture frames are on sale everywhere this holiday season. Here are a few PCW tips for buying digital photo frames:(1) Look at the frame's screen resolution. Higher resolution will better reproduce your images. (2) Consider the aspect ratio. Widescreen may let you enjoy your images in an untraditional manner. (3) Wired or wireless? Go with Wi-Fi capability if you want to open up your frame to content that lives on your PC. Got it? Now, let's take a look at some current models.