Wish I would have found this sooner! It's a little dated as it is a year old but holy cow! I wish I would have had this sooner! It shows which stroller these four car seats, the Britax Chaperone, Chicco Key Fit 30, Cybex Aton, and Graco Snugride 35 with Classic Connect, fit with.

http://www.thecarseatlady.com/car_seats/rear-facing_seats_9.html

They have single stroller, double stroller, & double car seat/ double stroller combos to look at. This just made shopping a whole lot easier!