The Offset and Dropped holsters are not legal for IDPA. I get around this by simply removing the dropped and offset hanger of my Bladetech's and then mounting the holster to my belts using a standard TekLok.
I have a number of Comp-tac products and really like them. Check out the "BeltFeed" mag pouch arrangements. They stagger the pouches and save space on the belt which is important to me. I use one for IPSC supplemented by a single. They are also great people to deal with. If they don't have what you need, they will recommend something from "their friends" at Bladetech. This is a very refreshing way to do business.
I don't have one of their holsters but wouldn't hesitate to buy one unseen. I would rate Bladetech and Comp-tac as equals. Both companies are very good to deal with and have very good designs and quality.