The NFL football season is nearly halfway done and you are still watching it on an outdated television. Now is the time to invest in a big-screen TV because prices are lower than ever.

Here's what to look for when buying a brand new big-screen TV.

Brand: It's not a big deal anymore. It used to be. However, now with smaller companies coming out of the Koreas, China and Taiwan, you can save a ton of cash by buying an off-brand like Seiki.

Size: It's all about viewing angle of your room and the size of your room. If you have a small room and you have a huge TV, it is going to hurt your eyes. But, if you have a nice big family room and want to get a nice-sized big-screen, you can.

LED or Plasma or "4K": LED is the preferred style of TV, but that's not to say Plasma is a poor choice. In fact, there are big discounts out there these days for Plasma TVs because the technology never gained much popularity. 4K is a new technology that is just too expensive to buy right now. Give it a year and it will be affordable.

1080 is the way to go: In big screens, you want a full 1080p display. Anything 32 inches or less you can manage with the 720p.

SMART TVs are worth it: For a few extra bucks, you can opt for a Smart TV. These TVs have apps like Netflix and Facebook and allow you to get much more out of your TV than just TV channels. It's worth the extra money.

Here are a few TVs to choose from:

40 inch Sony Plasma (model KDL-40R450A) on sale for $580.61

42 inch Vizio LED 1080p, 240 Hz, Smart TV on sale at Best Buy for $499.99

55 inch Samsung LED 1080p on sale at newegg.com for $799.99

What kind of TV do you have? Leave us a comment below and let us know what you think.