We have the xplory and LOVE IT. My DD is almost 3 and still fits perfectly in it and we will use it with our 2nd DC too. Check out the new versions of the xplory. They have come out with 2 different strollers. I am going to order the new chassis for our xplory seat.
My main reason for LOVING the xplory is the fact that the child is high, closer to you and doesn't have to sit so low. Another is it becomes a high chair when out to eat. We are frequent visitors to Disney World so when we are there, our DD can just roll up to the table and eat right from her stroller!