Can anyone help me make a decision on which double buggy to buy?! I've got an 18month old and a 3 week old. So far I've just used a sling and a pushchair which has been fine, but need to invest in a double pushchair now. I quite like the look of the phil & ted where one is behind the other, but not sure about how the little one would feel about lying down underneath her brother! Has anyone got one??