I have been wearing a Shivworks Specialist in lieu of my Wilderness FF polymer 5 stitch. For AIWB only carriers or just as a belt to hold up one's pants, it is all you would ever need. The polymer "buckle" simple disappears under a shirt. I suspect the V Dev Works and Langdon belts are similarly ideal for AIWB carry as well.
To get the similar level of "concealment" with my FF, I have to offset the buckle to 3:30 or 4:00 as a right hander.
FWIW.