Hi J.,
I too posted something like this several months ago when I was pregnant with my second. The recommendations were all over the place because everyone LOVED the particular stroller they were in based on their own personal situation...http://www.mamasource.com/request/5512623844403183617
In addition, I did quite a bit of research on the different types of double strollers out there over before I came to a decision that the Baby Trend Double Sit-n-Stand Stroller is the one for MY situation...
http://www.amazon.com/Baby-Trend-Double-Stroller-Skylar/d...
Since my first is 2 years old and my second was just born 12 weeks ago, I want the flexibility that allows my toddler to sit or stand in any of these three spots as he grows:
-- A regular seat (either front or back in this model), just like any tandem double stroller, for his current age and for later on when he's tired and needs a nap
-- The jump seat, for when he's older and doesn't need to nap
-- The standing platform, for when he's older and not needing a nap
I know you are worried about the $180 investment---and I'd prefer not to spend that much either---BUT, this stroller seems that it would last the longest as your kids go through multiple stages.
I hope this helps!
D.