I maintain my weight at about 2400 calories a day for 1 year so far.
I work out mimimum 5 X week, 1.5 hrs each time. I weight lift mostly and a little cardio. I'm more interested in building muscle than losing fat at this point.
I'm vegetarian, mostly vegan and I do the whole foods clean eating thing (not sure if that makes a difference in how much you can eat, but maybe it does)