PoorbutHappy, wow at twins, and you should stay, this is a due date thread isn't it? I think now I might end up with a Feb baby myself. My previous antenatal thread was April 2007, but both sets of twins and several other babies were born in March, and there were at least 7 May births on the thread including mine.
Mrs Magpie, as a first timer, don't spend loads of money on a huge travel system as you will probably need a more lightweight buggy before long. My stepsister spent £500 (eek) and then bought another stroller within a few months - and she drives everywhere, doesn't use public transport much. It's even more important if you rely on buses etc as I do that you have something you can get on and off with, and if needs be, fold or carry up and down steps. I have a Maclaren Quest, good thing is it's light, problems are that it's forward facing (issue for some so baby is away from you), brakes are rubbish and you need something else for baby to lie flat for the first few months. I had a pram via my mum's freecycle, actually we had two but the first one was a nightmare on buses, but we hadn't spent any money.
I think if I could get away with a single buggy I'd go for a Maclaren Techno which you can use from birth and which have better brakes. I'm quite tempted to try and pick up a double buggy for when needed and spend the real cash on my preferred single, and use a sling with baby or encourage ds to walk (we have over 6 months).
As Lenni says, it's a matter of what you need, how you use it etc.