Wow, thanks for all the feedback. Based on the comments I think I should elaborate a bit. I am not looking for a wide saddle, nor am I very concerned about the saddle holding up to my weight (though I have broken the rails once). What I'm looking is a long saddle. I've always got my butt hanging off the back of the saddle to make things fit. This is particularly uncomfortable with saddles that flare up at there rear. Leather saddles are even worse. As I said in the original post, I've ridden on a couple of Brooks, and I've also got a Ideal. The problem is that my weight end up on the rivets and steel rail at the rear of the saddle instead of on the tensioned leather, where it should be. I don't know if the new Brooks or the Sprung models are any longer.
I'll check out the suggested models to see how they look. Thanks again for the post. By the way, can anyone relate to this, or do I just have some sort of freakshow pelvis??