If you love your double stroller, what do you have? A few things we need:
I'd rather have a tandem stroller than a side-by-side, but if your side-by-side makes it through doorways somewhat easily, that's good too.
Our infant carseat is a Chicco Keyfit, so something that can carry that and later turn into a solid toddler seat is necessary.
DS currently likes being in a stroller, so that little skateboard thing that attaches to the back isn't the best option for him.
Re: Double stroller help
"I'll love you forever,
I'll like you for always.
As long as I'm living,
my baby you'll be."
I've also heard great things about the tandem city select. It can be a single or a double, and you can take out one seat and use it as a sort of snap n go with the infant carseat with adaptor.