You mentioned only two Chicco's in your posting, but your title says Combi? Have you looked at this book??? I researched the heck out of this book and ended up with the Combi Travel System. I lived in this book for amazing ratings on all price levels of items.
I chose it for three reasons 1. because of its ratings in that book, 2. because the car seat held more weight and one or two more inches than the others(hence lasted longer than most) 3 light weight stroller. My daughter was 3 in July and I still LOVE my stroller. It only weighs 14 lbs. so I have never even had to buy an umbrella stroller since most good ones wiegh this much anyway. My daughter loves the tray on this one and I love the storage space on the bottom, lots of shopping bags fit!!!! Most of my friends have the Peg Perego and mine has lasted much better.
PS: you may want to take a drive to Irvine to go to Bergstroms. I always thought it was a fortune, but we ended up buying all of our baby furniture there and the stroller. They have a giant selection and the employees really know the product.