I have 3 different holsters, only one of which is suitable for CC, that is a shoulder holster. The other two holsters are leather full coverage hunting holsters, one for my Colt, the other for my CZ's.
I am really big on covered protection of the weapon and retention, not because of concern from the bad guy, but because I like to ride horses in the back country and I don't want my pistols damaged inadvertently.
If I was shopping for a OC holster that was going to be mostly worn in a car or walking down a street, I would look carefully at what the LE community uses. The article the (link in earlier post) by the PPC was a good one.
I feel sorry for the guys in TX, it's hot down there and they have to keep covered...Ugh.