K.S.
I haven't read all the responses, but I got a double stroller with my third child because they were only 13 months apart. My first two kids are 2.5 years apart and I never felt I needed one. With two young ones so close in age, I did use it, but now that my youngest is 2 we hardly ever use it - they want to walk most of the time! If you do get one, I got an umbrella double stroller because it's light and easy to take with you. I personally don't think you need a huge one, but it might be nice to have a light (and inexpensive) on one hand for those times you do end up going to the zoo or doing a lot of walking. Good luck!