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TV Buying Guide: Get out tape measure before shopping

If you're shopping for a TV, get out a tape measure and do some quick calculations before you head to the store. And count the number of gadgets you'll want to connect to your screen.

Buying a TV is no longer just choosing how big a screen you want.

Here are some big decisions you'll face:



There's an emerging picture standard that offers four times the pixels of today's high definition. It's known as ultra-high definition, or 4K. But do you need it?

Measure the distance between your couch and the spot for your new TV. If you're sitting far away, a regular HD set will be just fine — for $100 to $200 less.

The farther away...