OK, we got a Mitsubishi Widescreen (WT46805) around Christmas time. It's HDTV ready and all, but I haven't pursued going HDTV yet. How much of an investment am I looking at both time and money-wise? How do you do it? Also, if anyone can recommend inexpensive equipment (I remember reading a favorable review on an RCA unit a while back), I would be much obliged. Oh, I should note that we have cable (as opposed to satellite).