As noted by another poster, the key in exposure for a D1x is the highlight area. You should have Histograms and Highlights ON and be examining them until you're comfortable with how you have to expose on the camera. If I histogram reports any pixels at the far right, you've lost highlight data.
The real issue that catches most D1 users by surprise is its unbalanced exposure range. The D1x, for example, can handle about 2.5 stops above middle gray (about the same as most slide film), but it can also handle 4 stops below middle gray (more than any slide film). Thus, it is far easier to pull up shadow detail using Curves in Photoshop on a D1x image than it is "fix" blown highlight detail. This is especially true if you shoot NEF format.
Thom Hogan author, Nikon Field Guide author, Nikon Flash Guide author, Complete Guides to the N65, N80, and F100 author, Complete Guide to the Nikon D1, D1h, & D1x www.bythom.com
Thom Hogan author, Nikon Field Guide and Nikon Flash Guide author, Complete Guides to most Nikon cameras www.bythom.com