hey matthewaynelson: The 2 holster mfgrs that intrigued me best were FIST and Bearcreek. If you are into leather, I really liked the Bearcreek best but I purchased the FIST one in kydex (they also make them in leather if you are so inclined) because it seemed to have the most substantial looking thumb push.
hey rksap: I started out with a cheap Mikes holster and did not find the sticky nature on outside to be sufficient when I wore larger pocket pants. I took the holster, cut a strip of the thinner bicycle inner tube that was around 2 inches longer than the bottom of the holster. Sliced it lengthwise (just enough to shoehorn fit the bottom of the holster, leaving the ends unsliced) and, using good silicone glue, attached it to the bottom of the holster. Folder over each edge so that around a 1 inch is left on each side and wrapped each edge with the sticky tape they use on ends of tennis rackets or hockey sticks; I also wrapped it over the rubbber tubing and made sure that some of the tape ended up securing the tubing to the holster where the tubing extended out from the bottom of the holster. I then smeared a little of the silicone glue over the tape to sort of secure it in place and wahlah I have wings on each side of the holster that can be bent when putting them into the pocket and they secure the holster in the pocket. I also took a small piece of tubing and placed it into the bottom of the holster so that the firearm still stays in place but not quite as secure--allows it to move out of holster quicker with little "drag". The combination works well but I still went ahead and ordered a thumb push per the above reply.