Hi there - I have a 26 month old and an almost 3 month old. I ended up registering for and recieving the "Contours Options Tandem" by Kolcraft. What I like about it is that it works with many different car seats, the seats move to different configurations, large basket and it's pretty easy to stear. It is a little large for me because I have a 4 door sedan, so it takes up most of the trunk space. Other then that I really like it and it gets the job done. You can purchase it through babiesrus.com (not in stores, amazon.com and walmart.com.
The other one that looks interesting and I wish I had noticed it before, is the "Sit and Stand Elite Stroller" offered through onestepahead.com. This too is versitle with many different car seat brands. Plus it allows you to use it as a double stroller or a Sit and Stand. Weight limit goes to 45lbs which is higher then most.
Good luck