It never occured to get them in any other caliber than .45. I have two SS NVs in that massive caliber. I have a fetish for all things .45 I guess, as I love ACP as well, love 1911s, tommy guns, grease guns, you name it.
So when I got into CAS, I knew there was a .38/357 option, but it never crossed my mind to look into it. I have never regretted the decision, especially when I loooked into CAS factory loads for each caliber and found out you really don't save much by going to .38 anyway.