Thanks Rob. I found a caculator that used my height and build(rough estimate based on wrist size) to calculate:

Ideal weight range is 154 - 169.4 lbs. (70 - 77 kg.).

To me that seems pretty light.. but its something. I can always readjust it later. I've changed my goal to 165. That seems like something possible, but also something that will take alot fo work.

15 pounds to go.