We are buying double pram as well cause we'll start trying for number 2 at like 10 mths...
I've looked and test driven (Lol) heaps of double prams and have my heart set on Strider Plus. It's amazing and heaps easy to manouver! The seat reverses not the handle which is good cause then the steering doesn't go all weird! HEAPS of space underneath in the basket and both seats can recline so both bubs can be sleeping at the same time. It's also one of the cheaper ones considering most are over $1000.
Here is a link to the Strider:
Strider Plus Pram Stroller - Steelcraft Britax

We figured that it was way cheaper to buy a tandem now instead of spending $300-$700 on a single pram to only have to spend another $600-$700 in 18 months time when the second one comes along. And it's so easy to attch the second seat.

LOL I sound like an advertiser!! hahah