OK, I have had a 52" widescreen with HD capapbilities for 2 years but was never really interested in getting an HD tuner or what not.Here are a couple questions from an HD noob! I only have standard cable, not digital.Can I still get the full capabilities of an HD tuner? Is an HD tuner all I need to purchase to get an HD picture, or is there some kind of extra monthly fees to get it? Can someone give me some good brands to purchase? Something reasonable. Thanks folks!