#2 is my favorite. I always loved watching my kids sleep when the were little. Congratulations on a son. Enjoy him and enjoy your time playing with him. I know you have heard it before, but they really do grow up way too fast.
These are some nice photos of your son, how old is he now?
I like his cheeky smile in the first photo but deplore the fact that you show us so much rug in the foreground but cropped off part of his head .
Photo 2 is really nice. They look like little angels when they sleep, don't they? Nice use of window light!
Brokepilot is right: do enjoy your time with him thoroughly. They will be grown in no time. My "baby" is 14 today (to the day)... and she was only a real baby a "short while ago"!