Recommend your favorite lightweight stroller!

We've used the jeep stroller for my son since he was born, but it's 30 lbs and SO big. Since living in an apartment it's just been really tough to use and store. So I'm looking into something else for my second baby.

What are your recommendations?
I would also really like the kind of seat you can face forward or backward, if possible.
Bonus if it'd include a seat or riding board for DS- but not a must!