I am 19 inches in torso length as well, and the VT medium did not fit me. Unfortunately, the large version was way to long (fits to 23 inches, I believe). The ULA Circuit fit me much better - true to a custom fit.

However, if you are willing to carry a little extra weight and a slightly larger pack (and are sold on GG), look toward the GG Meridian packs as they are adjustable in torso length and have fully interchangeable shoulder harnesses and belts for a clost to custom fit as well.