Linda, I think your plan is a good one.

Even though it's scary (I know!), there's only one way that you're going to be able to find out what YOUR upper limit on maintenance calories is ... and that's by you biting the bullet and experimenting. In the end, it doesn't really matter how much the rest of us can eat. Sure, I can talk about my experiences and tell you that the average maintenance calories of members of the National Weight Control Registry are 1400/day, but I don't think your body is going to be paying much attention to peer group pressure.
One question .... I recall that you have a free meal once a week, right? Do you count those calories in with your daily totals? In other words, when you say you aren't losing on 1200/day, does that include the free meal? Or is that separate? If you don't count it now, maybe think about including it when you go higher, just for the sake of accuracy? (since your body will be counting it, even if you aren't

)
And don't pay any attention to what the calculators say about your maintenance calories! They're notorious inaccurate, especially in the case of people who have lost a lot of weight (they're based on studies of the metabolisms of normal weight people, not the 'reduced obese').
One last thought - there IS a way to increase your metabolism and allow you to eat more and still maintain. Build muscle!

When we diet and don't lift weights to maintain muscle mass, studies show that up to 40% of the weight we lose is muscle. The result is a slower metabolism since muscle is metabolically active and is the calorie burner in our bodies. But if you work out to build muscle back, every additional pound of muscle that you add will burn an additional 20 - 25 calories per day, 24/7, awake and asleep. So if you added ten pounds of muscle this year, you could eat another 200 - 250 calories every day and still maintain. Good stuff!
