I too am contemplating an X1 with a little one. Gotta be realistic regarding the cargo capacity of this car though: Infants and toddlers require ALOT of stuff, especially for weekend trips. Stroller which varies greatly in size, bags, play yards and the kitchen sink! Add two or three passengers, and your packed in like sardines.
Personally, I would only get an X1 with two infants / toddlers if we had something larger for our other car. There is nowhere near enough space for me. So this means my wife will get a highlander and I will get the X1 when my lease is up