Thank you for your response!
We're looking for a 1 or 2 year old girl this time around.. In a sense that will be easier, yet harder, too, I imagine. He'll have a playmate pretty much from day one, but, I can see it already..

Fighting over toys, over attention..
We'd like for them to share a bedroom while they're both small. Then again, how will Shai feel to have an "intruder" in his room?
I agree that it's vital to make sure that he won't feel left out or displaced. He is very possessive over his Ima and Aba..
Oy, so many things to consider.
Once our new child will be home, I'm sure we'll manage, but, oh, I appreciate any suggestions and input to get myself ready.