That's pretty much how I arrived at my 1500-a-day calorie budget. It's worked out very well for me, but I also know that my actual
calorie intake at or near my maintenance weight will probably be lower than what the calculator says.
Calculators don't take into account the fact that when I'm 150 pounds, I won't be someone who's always
been 150 pounds, I'll be someone who's lost a bunch to get there--and that means I'll almost definitely have to drop my calories as I approach my goal. It's vastly easier to go from 1500 to 1300 than it is to go from 2500 or 3000 or whatever I used to eat to get to my starting weight to 1500, though, so it shouldn't be much of an issue.
I'm not the fastest loser in the bunch as my ticker will show (I started at the end of October), but I've also been able to stay with this in a way I hadn't been able to stay with any non-supervised plan before. I've broken my old "diet" record by at least two months already, and I don't feel deprived or punished; I could do this forever if need be.
So yes, count me as a vote for your plan because I'm having success with pretty much the same thing.