Way to Go!! First thing you have to do is have your bow checked for cracks or twisting of the limbs (I have had great luck off of ebay). Go to a local archery shop and have them set you up and this will save a lot of frustration later on. If you go to Easton's web site (sorry I son't know the address) you can probably find a chart that can help you out for you draw length and weight.

Welcome aboard
Eric