Hello, I must admit I have not kept up with TV tech. I want an HDTV, but don't know where to start. Can you get a good 42"-50" HDTV for under $1500. What's the difference between the HDTV capable, ready and so on? What do I need if I will be connecting to a DirecTV HD receiver or the cable companies cable box? Every single TV seems to have the same specs. Is there something specific to look for? What brands are best?