Start out with a draw weight you are comfortable with and learn to shoot it. That may mean something lighter than you can hunt with, but it won't matter if you have a 100# bow if you aren't able to put the arrow in the right spot. Consider this: when you want to hunt with a gun, you don't learn to shoot with a 30-.06 or a 12 gauge with slugs--you have to start out with something you are comfortably in control of and move up from there.

Some folks can learn to shoot with 45# bows, many can not. Probably the most common, and one of the worst mistakes new archers make is going with a bow that is too heavy in draw weight. This will cause you to develop bad habits that are a devil to break. Get the light bow first, and later on you can sell it, keep it for a target/plinking bow, or better yet use it to introduce someone else to the sport. Another option is to get a take-down bow. You can buy two sets of limbs, or later on when you have established your form you can get a heavier set for hunting.

Good luck!

Chad