M.K.
i used the instep but wasn't that happy with it. the seats are too small for my older one. my children are 2 1/2 years apart. you have to remember that your older one will be close to three by the time you use it with both of them. definitely, get one that has the swivel front wheel and keep in mind how heavy the stroller is. lifting it into certain cars can be difficult. the best advice i have is, borrow one or buy a used one. most people don't use it that long. i have a new one and a borrowed one. i prefer the older one because the older ones have bigger seats. good luck and congratulations!!!