Thanks to all who replied. A follow-up to the suggestion about having the guys at the Specialized dealer measure my backside.
I thought they'd use a tape measure. Really.
I was in a Specialized dealer recently to inquire about a chain tool and happened to see their measuring device. It's a board with a gel pad on it and some kind of calipers and a ruler behind the gel pad. You sit on the pad and then stand up, turn around, and adjust the calipers to match the indentations on the pad and that's your size. Very cool!
Not having the money to purchase a saddle on this visit, I didn't try it, but I know where to go when I'm ready.
You guys probably all knew this but maybe someone who doesn't will read this and learn something, just like I did in this thread.