You are doing great!

Congratulations on your weight loss! It is wonderful that your diabetes has improved. Based on what you have written, at this point you certainly could consider body contouring surgery. In general, before considering surgical contouring, you want to be at a stable weight (for several months) that is within 10% of your personal goal weight. Your "personal goal weight" is something that is fluid and changing with time. When you first start considering weight loss, you can look at a height chart and pick a goal weight. The BMI scale is good for this:
http://www.nhlbisupport.com/bmi/
However, once you loose a large amount of weight and start a healthy exercise regime, you may find that you plateau. If you keep your weight stable for a number of months, while having a healthy diet and maintainable exercise program, it is then reasonable to reassess your goal weight. The BMI charts are a nice guide and tool, but there is no number set in stone as to when you should consider body contouring.
That being said, your BMI is 25, you sound healthy, and you are within 10% of your low goal - it is a good time to start consulting with a surgeon!