Ok I know this is coming a year too late, but it might benefit to other expecting moms: I just found a great stroller! The brand is called "Bebe Confort", and it's from Switzerland. I thought I would'nt be able to find it in Hong Kong, but there is a retailer! Anyways, back to the stroller: it's a tandem, but normal sized stroller (76cm length) and it's made to find 2 car seats when they are newborns, then normal seats when they grow up. And you can turn the seats anyway you like. I'm soo getting this one. All the other ones are just too bulky.
For those interested, it's called "Twin Techno" and the website is
www.bebe-confort.com (then click on Welcome - International). Hope it helped!