Stuart Richardson , Feb 10, 2007; 11:11 p.m.
Your best bet might something like an Alpa 12, a Cambo Wide DS or a Horseman SWD. These are all dedicated wide-angle cameras. Most of them have some shift capabilities which may be useful. They take large format lenses which gives you a lot of flexibility. The lenses can go VERY wide, and the quality will most likely be even better than the best hasselblad lenses. They take digital backs, or they will shoot 4x5. If you use a fairly large sensor digital back with the SWD and use a 24mm lens, it is equivalent to about a 17mm lens on 35mm, so enough for your purposes.