I have looked into this recently as we would like to have another baby soon and our daughter is only 8 months so would like to get a pram that takes two.
The best pram I found was the Valco Rebel Jogger. It is pretty expensive ($500.00 new + $100.00 toddler seat) but an absolute dream to steer and you can have the baby facing you or away from you by reversing the seat. The toddler seat also holds up to 20kg. It is compact and folds up really small for a jogger. The toddler seat is extremely easy to remove. Once I am pregnant we will be most likely buying this pram.
I like the removable toddler seat better than the double prams. In my opinion double prams are too bulky and hard to manouver as well as limited use cos the older one will want to walk before too long.
4 lovely munchkins DD 10/03, DD 03/05, DS 10/06 &