Planning to purchase a HDTV TV and don’t know much about HDTV. The two models I’m looking at are the Pioneer Plasma PDP-4360HD and Pioneer Elite Pro-930HD. Both are HDTV ready. Most of my TV watching are DVDs and local stations. My question is do I only a HDTV amplified antenna to watch local stations HDTV channels since I don’t have DirecTV or Cable TV services.