I would think a Brooks B17 would be an excellent model for you to try. I loved my B17 and put several thousand miles on it before I decided I needed the wider Brooks B68. You are not as wide as I am though in the sitbones, so I bet the B17 would fit well.
Remember your sitbones might be quite sore for the first few rides on a Brooks if your sitbones are not used to holding up your whole weight and if you've been riding padded saddles. That soreness should go away after a week or two of riding.
If you order your Brooks from Walbike they have an excellent return policy after you use it for a while to see if it's right for you.