Actually that's an older pic, from 2010. The Serpa is OK, it's relatively inexpensive, it's nice to hear and feel the "click" as you re-holster. I've never really become attached to it because it sticks out too far for me. I'm wide enough as it is. When I put this on I smack it into damn near everything.
As far as safely drawing, I have 2 Serpas, one for the 1911 and one for my Springfield Armory XD45. With both, when I depress the release and draw, my finger ends up along the slide, not on the trigger. Practice. Practice until it becomes second nature.
It should not require a conscious effort to keep your finger
off the trigger.
It should require a conscious effort to get your finger
on the trigger.
That said, I am currently using a leather pancake holster by Desantis, the "Cocked and Locked" holster...
I have always preferred leather, and all leather pancake holsters I have tried hold very tight to the body, and do not flop around when walking like the Serpas do for me. I use a Don Hume pancake with the XD45. Both are thumb strap and also fit snugly inside, adding to the retention. I consider the Don Hume to be a better made holster.
I don't recall reading what firearm you carry, so I can't make any recommendations there, but both my leather holsters were less than $75. I searched and found what I wanted, then started searching for price. I ended up getting both of them new-in-package through ebay for right around $60 shipped. Not a bad price.