Everyone has already said it, but congrats! Enjoy the new you, and don't let anyone's comments get you down. You should be where YOU are happy and healthy. I've been told I should lose more, I've been told I was too skinny. bah.
I am 5'2'' and 130-135 lbs at any given time. I still have this mental "120" in my head but I haven't been there since 21 and I'm very happy with my size and shape right now. I am typically a size 4, xs tops, s bottoms. I am a real pear with big hips for my frame. Like I almost need a little girls size Large top but I'm all mama in the hips.
I wouldn't mind toning up even more in my thighs and belly, but that has much more to do with composition than weight. I work out 1000-1400 minutes a month (I only know the amount because of the thread here on Mothering. lol) I would imagine that if you work on muscle gains you could weigh more at your goal body than if you are at a higher fat percentage. If you don't build muscle, I would think 140 is a good weight. With more muscle you could probably be 150-160, but like everyone has said, it is such a personal thing!
Congrats again, enjoy vegas, and love your body. <3