Since the subject of the Walther p99 has been up recently lets say with a auto like the p99, which would be a "better" shoulder holster, a vertical one or a horizonal one? I own a horizonal Uncle Mikes one, but find it to be rather bulky because the slide length is obviosly longer than the gun is tall.....its not a great concealment rig but it does offer a fast draw. Would a vertical rig offer a slower draw? is that the downside to them? comments or suggestions would help.