Yeh, the blade techs are pretty plain jane, but will work for everything across the board, though - idpa is the only game that limits to what sort of holster you can wear, uspsa and steel you can use just about anything.
Here is the DAA race master
It's a great holster, strong retention - and can be used with a variety of other guns by changing out the internal block that holds on to the trigger gaurd.
CR speed :
The 625 is a great gun to have, it's the best gun for USPSA and IDPA, but for steel - it's probably your not so best option, 6 shots of .45 acp isnt great for steel challenge, one miss is all you get ! I'm a pretty crappy shot, so I use an 8 shot revolver with 38 special. You might want to look into the S&W 627 series as well.
-alec