[magoo6541]

I shoot a DT11 Sporting with a flat rib and a DT11 ACS that has a TSK stock.

The ACS has the advantage of being able to adjust the POI depending on the sport you're shooting. I have the rib all the way up for a 60/40 when I shoot skeet. When I shoot trap, I lower the rib to a 90/10 POI and the mid-bead and front-bead are aligned.

If you like to really get "into" your gun with your stance, a flat rib might be your preference. If you like to have a more straight up stance, a higher rib might work better for you. If you're wanting one gun to shoot multiple disciplines, the ACS may work best.