Goal weight re-evaluation

So now I'm wondering what my goal weight should be.  I started looking around on the internet for different calculators that would give me some sort of idea.  I got suggestions ranging from the following suggestions: 129-137.  The formulas from 1964 & 1974 are in the lower range.  I'm a little suspicious of the higher number.  Hmm.  This morning I am back down to this year's low of 136.5lb after three weeks.  I definitely feel comfortable losing another few lbs, so I guess I'll keep going to 130lb.