With a 2 year old spacing I suggest getting a single that can convert to a double since your toddler won't need a double all the time (maybe the mall, zoo, amusement park....)
we have a baby jogger city select. It can be a single, double, use a car seat, single with added gider board for toddler, seats rotate in different directions.....but it is expensive! Many do fine them used for $350-400
others that convert are Phil &teds, Britax and a few others.