Re: which Tactical Holsters and Why?
I voted for the Safariland 6004. I have carried numerious firearms in them. Overseas I carried an M9 in one and never had any problems w/ it the sandbox. Back home w/ the Sheriff's Dept. I carried a Glock 22 in one and I never had any problems w/ it either. I am in the process of picking up a Glock 17 and I will be purchasing another Safariland 6004 as soon as money permits.
I don't have any expereince w/ Blade-Tech, however, I do have some experience w/ the Serpa. I have used multiple Serpa concealment hosters w/o any issues. With that being said, some of the officers that I have worked with used them (especially our K-9 Unit) and they said that the Serpa does not hold the weapon as tight on their thigh as the Safariland 6004 (ie. The Serpa flops around a lot more than the Safariland 6004 while running/jumping/fighting...that kind of stuff).
Again, I use Serpa for concealed carry, however for a drop holster I would go with the Safariland 6004...that is from my on personal experience. Hope this helps.