Finding the right kind of stroller for 1 or 2 children

As I mentioned on my introductory text, we have a toddler and we're also expecting a baby-boy this july. That means we need a new stroller that would suit for both of them. We've had quite a few different ones in the past 2 years, such as Gesslein vision (it's an older one) and Emmaljunga scooter-s-air, to name a few. To be honest, I found myself as a 'stroller crazy' -type of person and it seems, I'm always looking for new ones. This time around I will choose my last ones - no more changes, says my husband :) Luckily I started this process early on so we're in no hurry yet - I still have time to make my decision.

I have a few different ones on my mind and here are some of the qualities I'm looking for:

• Stroller for two (that's the minimum requirement) but they need to convertible for 1 or 2 children
• Preferably narrow ones (I use public transportation a lot)
• Cocoon carrycot for the baby as he needs to lie flat
• Not too heavy (I walk a lot)
• Basket or some other place for groceries

I've looked into Phil&Teds (narrow, suitable for 1 or 2 children) and my new favorite Bugaboo Donkey (suitable for 1 or 2 children but not that narrow). I've been thinking about P&T stroller for a while but I have to Bugaboo Donkey just kind of wins - I've heard so many good things about it.

What do you think, which one do you prefer? Or do you have another one I should consider? I have to say the choice is very hard - I'm even gonna say buying a car is easier than finding the right kind of stroller! ;)

I also found this site that sells strollers and accessories to them. Have you seen this?