Before I get a bunch of comments about attachment parenting, and why I am trying to get him in a crib if I obviously want him in our bed, here is why:
Our bed really isn't big enough for all three of us. My husband is constantly almost falling out, and Ben is only getting bigger.
I'd like to cuddle with my husband again sometime this year. He'd like that too.
I do think it's important for him to learn to sleep alone. I think he needs to know that he'll still be safe even if I'm not there while he's sleeping.
I'd like to be able to let our daughter occasionally crawl in with us in the mornings. A bed not big enough for three certainly isn't big enough for four.
We need to start lessening the times he wakes up to eat at night, and I think after he gets used to his crib, he won't wake up as often, since we won't be moving around and jostling him.
And by the way, I am not planning, at this time, to have him cry it out. I did that with Kaia, it worked well with her, and I don't think it's wrong, but I don't think it's right for him at this time.