I agree this varies from person to person, how they carry their weight and comes down to opinion. I could give you my opinion, but its just that.
2007- 230 lbs to 160 lbs after baby #1 Boy
2010- 220 lbs to 145 lbs after baby #2 Boy
2013 - 215 lbs to 157 lbs after baby #3 Boy
Baby #4 - It's a Girl!
Pregnancy Goal: Maintain current weight between 175-180lbs