Travel systems

Kimberly
Any recommendations for an easy to carry, light car seat/stroller combo? I have health issues that make lifting/carrying heavy things difficult. It's hard enough, that I'll have a heavy baby to carry, so I'd like a light car seat (that is still safe) that fits into an easy to lift stroller (I live on the second floor with lots of stairs).
When I read reviews online all the "lite" ones have reviews complaining they aren't really light!
 
Thanks!