WOAH! Now that is to hard of a question! They are ALL awesome! I would not be able to decide either! When they do so many poses like that they make it so hard on the families! That is how they make there money!!! Maybe you can get one copy of each picture just for your own personal keepsake.
To sum it up in one word..ok two..VERY PHOTOGENIC!! They are all great! Your kids are beautiful! The photographer has captured some wonderful poses of your kids..it would be very very hard to pick!! Good luck!