Lightweight stroller decision

[lmintzer]

My first baby is due in May, and I am debating about which stroller(s) to purchase. I have narrowed my decision down to the Combi Ultra Savvy OR the Peg Perego Plikomatic and the Snap-N-Go. The price is about the same for the Combi or the Peg + Snap-N-Go. I like the idea of buying only one stroller (the Combi), and I certainly like how compact and light it is and that you can now attach an infant carseat. However, I have seen toddlers in them in the mall, and they look awfully crowded. The Peg Perego Plikomatic looks very sturdy, well padded, and has lots of room for bigger children. Then again, it's 4 lbs. heavier and doesn't fold up that small. I'm wondering if the Peg Perego would fit in an overhead compartment on an airplane (it seems the Combi Ultra Savvy would). Has anyone had a problem fitting their toddler in the Combi Ultra Savvy (or similarly-sized stroller)? Thanks so much for your assistance.

Lisa