We have just come back from a 3-day expo in Melbourne with Bumbleride, our American stroller (see www.bumbleride.com.au) and it was great to be able to help expecting parents find their way through the pram jungle. The common scenario is that parents-to-be find it really hard to know what to look for and to the untrained eyes the prams look more or less the same. And they are, in many regards: they all have seat, bassinets, car seat adaptors etc. BUT they do not have the same wheels! and when you are pushing a loaded pram across the park it is all about the wheels. The harder and smaller the wheels, the less places the pram can go. A really simple rule of thumb. So it is important to think about your lifestyle and what you would like to do as a parent and make sure you match the features of the pram to that. If you want to be outdoors on trails and on the beach it is no good your pram is built for an urban terrain with smooth footpaths and roads. However, the other way around is fine: large air filled tyres are as good in the city as in the bush.
The second thing to look for is the size of the seat and foot well. Although a smaller built and frame means a more compact fold and possibly a lighter unit, it is absolutely no good if the size of seat has been compromised. Your child will grow and how ever many good features the pram has, it may be too small when your child is just 2 years old! Look for a tall back rest, a good depth seat with support for the thighs and a descent foot well.
These two pointers should be a good help and before you know it you have narrowed down the choice. Then apply the rest of the features you would like and google internet reviews and hopefully you are able to make your purchase. Good luck.