Depends on were you live. There are some good local places, some retail chains don't do to bad of a job. It really all depends on the fitter (the person) you get to fit you. Go ask around. Maybe go to a golf course and ask a local pro were a good place is.
Torque, helps decrease the amount of rotation the clubface has through the swing. Lower torque means less rotation. With slower swing speeds, it becomes less important.
Weight, can decrease swing speed. Heavier golf shafts are naturally stiffer. So one way is to find a shaft type you like, and maybe get it lighter or heavier. For example a 60 gram stiff is going to be slightly stiffer than a 50 gram stiff shaft of the exact same make and model, in most occasions.
Launch is dictated by your swing, and by the kick point on the golf club. Basically the club will bend at a certain point, or load. A high kick point will lower the launch angle, low kick point will increase the launch angle.
Again, a fitter will have more information for you, and what your looking for compared to what you currently have.