I have both the Duiker and the larger ArrowMaster. For a longer trip, I would choose the ArrowMaster, especially if you were planning to carry arrows with various heads. The Duiker is a great little side quiver and will serve you very well for a normal day's hunt. I agree that you can look down inside the quiver through the side hole and see what head is on the arrow that you want to select. I also agree that it is best to position the arrows where you can find the one you want easier. That is harder when the head is not a broadhead, because only the broadheads will be firmly held in place in the foam and the others will try to move around. I like both the SafariTuff side quivers and the lighter bow quivers (EFA and Kanati are my favorites), so I would probably choose to put some arrows in a bow quiver and carry the others in a side quiver for a multi-day hunt. That way I could quickly and easily see exactly which head I was getting out of the bow quiver, and I could have the side quiver handy with extras. The bow quivers will hold the various heads in place because of the grippers on the lower part of the shaft that keep the heads shoved up into the foam in the top cover. Other options for a side quiver are the Asbell GFA quiver and the Farr West Absorkee quiver. All of these are good quivers and may give you some additional options to accomplish what you are trying to achieve. I do think the Duiker is a great little quiver if you decide you don't need the extra arrow capacity or the attached pockets of the ArrowMaster. Rod Jenkins is a wonderful person, and the products he has designed are outstanding.
Allan