hi moms! we're travelling the end of this month to NY and we're scouting for a lightweight stroller (pref. umbrella folding) that would be perfect for a 3 month old baby (weighs 20 lbs.). we have a rockstar baby stroller, much as i love it - it just doesn't fold umbrella-style perfect for travelling. is there any particular stroller you just use primarily for travelling? easy to maneuver in airports and is lightweight? any suggestions? TIA from a first-time mom!