I based my goal weight on the BMI Chart, for someone who is 5'9" my weight according to BMI should be between 142 and 156...so 150 is a nice round number between that range.

On the other hand...I have not been that light since I was about 14 years old. So as I get closer I will see what happens, and determine what weight is right as I get closer to ""Ideal"" weight.