This entire discussion reminds me of how much I hate the entire HD space. Different display resolutions, technologies and specs. Different output resolutions, cables, scaling, formats - gah. And the prices of these units just boggles my mind. I spent $500 and it was a huge blow to to the budget - I had to spend my mid-year bonus on it. I did a couple months of research, on and off, just to be able to follow these conversations and make a semi-informed decision. (Though to be fair I'm kind of an idiot, so part of it is me.)
The cherry on top was being met with mockery and derision when I made the purchase by AV snobs. Were Halo 3 not coming out, I'd be content to tell the entire HD space to go die in a fire while I rode that SD set as long as it lasted. Stepping into HD was one of the least pleasant experiences I've ever had as a consumer.