I totally agree with Robin..
you have to find out, really, for yourself..
and it changes.. depending on (for me) your time of the month (I need about 200 more calories each day.. the week before my period) and your activity level.. (well obviously)..
I think the most important thing is to try to eat intuitively.. I have found out I can eat a higher number of calories if my diet is protein rich, than I can if my diet is carb rich (and I mean good carbs)..
I think the 1650 sounds like a good place to start.. I can actually eat around 1800 a day and still lose about 6 pounds a month.. (so far)..
I found this site that really helped me figure out what my "base metabolism" probably is close to:
http://healthone.icu.ehc.com/healthc...tofcalculators
hope that works.. if not PM me and I will send it to you...