BabyTigger, here's something to think about:
Once you set your "official" goal weight with Weight Watchers, that will be your WW goal weight for Lifetime Membership purposes *forever*.
Are you planning on becoming a WW Lifetime Member? (Meet your goal weight, maintain it for 6 weeks, then weigh in once a month and attend as many meetings as you like, and you pay *nothing* as long as you're no more than 2 pounds over your goal weight.)
Will you be able to live with that very ambitious goal weight when you're 40? When you're 50?
A strategy you might consider: think about setting your WW goal weight at the TOP of the WW range. You can have your own personal, private goal at a lower number, but your "official" WW number will give you some cushion for WW Lifetime Member purposes...
Just something to think about, this is what I have done. My WW goal weight is 15 pounds higher that my true goal weight...