Hi guys, Im in the market for my first DLP. However, I may only have enough cash for a refurb. Samsung has three generations of TVs to choose from. I know one uses the HD2 chip, another uses the HD3 while the last uses an HD4?? (ive also heard of a new HD2+?) From what I understand there are important differences amongst these various models. Also, should I be considering any other brands? Any info on the subject would be greatly appreciated. THANX!