Even if blu-ray doesn't look that much better, I really want an integrated tv with blu ray for compatibility. I have another 50 inch and I don't want to have to plan my Netflix rentals based on the tv I plan to watch it on. Especially in a unit where I can't upgrade the dvd part later, I'd like to get the latest and greatest now. If I get one with integrated dvd instead, I'll just have to upgrade that much sooner and it's more expensive since I have to upgrade the whole tv.
I know that's a big reason not to get integrated in the first place, but I'd like to go with a minimalistic look. I've searched for either a wall mountable dvd player or a smaller one that I could fit on the mantlepiece (the size of a portable without the screen), but I didn't have much luck with that approach. I would think that it would be popular for people without attaching a sound system to want everything together without having to put shelves in.