Hello, I have a Maxi Cosi Cabrio purchased in the spring of 2005. At the time, it was the previous years' model. I'm wondering if I'm ok to use it with my next baby, due November 2010. I've looked, and there is no expiry date on the seat. I'm considering getting the Radian Sunshine seats for my three girls (ages 5 & 2, and the new baby), and wondering if I should just get it now for the baby and keep the Maxi Cosi for the stroller. I do love the car to stroller convenience of the Maxi Cosi, though, but absolutely don't want to compromise safety. Thanks for any advice.