Walter,
The 14 inch Commercial Ektar is one of the three lenses I *always* carry for 8x10 work. The Commercial Ektar is a relatively simple tessar design, but the quality control was fabulous. The lens (according to Arthur Kramer in some discussion years ago) was optimised for contrast, rather than resolution, specifically for use by commercial photographers shooting chromes for full page magazine ads. This is apparantly why it is also wonderful for b&w contact printing work. In practice, while tessars don't have enormous image circles, you've still got tons of adjustment available on the 8x10 format. My Deardorff comes very near encountering bellows cutoff before the Ektar runs out of image circle.