Low-light performance (Score 2, Insightful)

As someone who shoots weddings as a side business, I don't need any more megapixels. For me, it's all about low-light performance. I'd like to be able to shoot in a dim church without having to resort to flash. I currently shoot a Nikon D200, which is 10 megapixels. That is plenty for everything I do, even enlargements. I'm saving up for a D700 which has incredible low-light performance. I've seen shots taken with the D700 (or D3, which has the same sensor) at absurd ISOs like 3200 or 6400 that have as much noise as my D200 has at ISO 800.

More megapixels actually introduces the (relatively small) problem of storage. More megapixels = larger filesize = I need to buy more compact flash cards and long-term storage. But, this isn't a huge problem since storage is relatively inexpensive.