I moved my first child into his crib at 6 months when the recomendation is for lowest risk of SIDS (if you read most sites, they will say have the child sleep in a crib in your room for 1st 6 months).
I plan to do the same for my 2nd.
This is what makes us feel comfortable. Different people are different and you should do whatever makes you comfortable. I am told I am anal by my whole family (as I follow pretty much every single guideline including having my almost 3 year old rear facing still as he has not reached the height/weight limit. Other peds say 2 is ok, mine says until they reach the max limit for the seat is best, so that is what I do).
In short-- do what you think is best:)