A couple of questions to kick off my HDTV research... Over the air...is this just for people who do not have satelite or digital cable? I have Dish Network...would I still need a roof antenna for HD local broadcasts? Tuner...Do I need an expensive set top tuner or built in tuner or would an upgrade on my Dish network reciever do the job?...or do I need both. Prices...how far do you see them falling and how soon...what do you see a high quality appx.50" wide HDTV monitor going for in June?...August?...October?...Christmas? Any suggestions on models to watch out for a good deal on...(80% TV but dont mind the strech mode Ive seen in Circit City 20% DVD currently but a new set will change the ratio) What new features should I hold off for? Background- my next TV will be wide HDTV...no interem purchases are possible.