I know there has been a lot of posts on carseats, so hoping one more doesn't irritate too much, but needing some help getting started with research. We are expecting our first in Aug. and are looking at the Chicco Keyfit 30. We are also foster parents and are likely going to be fostering a 2.5 and 4.5 year old here soon. So we are looking at a convertible and high booster? We drive a 2013 ford explorer so I know that we will be able to fit all three somehow, but need some help on where to start. I've done some searches, but all seem to link back to forums. Any links to sites with comparisons for different vehicles? We're planning on going into the store and trying a few in our car, but it's been so cold that I can't get motivated to try out installing seats and I'd like to narrow down the options. Anyone with a similar vehicle and 3? What do you love/hate about your seats?