Based on several suggestions here, I picked up a Selle Anatomica Titanico X. I picked the mahagony leather, but after I put it on the bike I thought maybe the graphite would have looked better on my Litespeed titanium frame. No matter. It's still a pretty saddle.
I installed it using the same measurements for height, fore/aft, etc. as the Brooks B17 I was riding. With holiday activities, I won't be able to ride until Saturday, but just sitting on the thing briefly it feels pretty good.
I had installed a slightly shorter, but higher angled stem and that really seemed to dramatically improve the comfort of the Brooks I've been riding--much less perineal pressure. Looking forward to riding the new saddle and I'll post my results.