misseskimo pram choice depends on your lifestyle and budget really. If you do a lot of driving e.g. into town to pop to shops, cafes, baby groups then travel systems do make sense for the first 9 months or so I think. However, I walked everywhere with my first and never used the carseat on the system. We had a second hand really old travel system which was great as it was very cheap and did everything we needed, the pushchair bit was good when DS was old enough for it and folded small but it couldn't be rear-facing and it was very heavy and cumbersome with the massive carrycot on top (although it made a good travel bed!) so difficult to use on public transport etc for the first 6-8 months as I couldn't fold it down.
For these reasons I wanted a new lighter buggy which was suitable for newborns without carrycot, so got a Graco Evo which is one of the best reviewed of the cheaper options (£250 odd new I think, we got it on offer)! It can be rear-facing and lie flat, so no need to use a carrycot for newborn which means it stays light and foldable (though doesn't fold as small as an umbrella fold buggy, but should fit in a Ford Focus without problems I think), lots of storage space so I can use it for a weekly shop / days out with 2 children and is good from newborn up to 3 or 4 (looks a bit small for a 4 year old but don't imagine I'll want to use it for one anyway!) There is a compatible car seat that attaches but it doesn't have good reviews, however I think the standard maxicosi version also fits with an adaptor and you can buy a carrycot too although I don't think that's necessary. I have trialled it with DS (2 1/2) and he loves it so far. This is just what fits my requirements of not too pricey, light for lots of walking up hills and one-handed fold for public transport as we take busy trains a lot, so might not suit you at all if none of that applies!
I also looked at and liked the Silver Cross 3D travel system which is on offer at mother care at the moment, half price! I didn't go for it as the buggy can only be forward facing so would need carrycot for newborn and I wanted one that I could easily handle one-handed (to leave one free for grabbing DS if he makes a break for it!) so with just one handlebar.
Sorry that was a bit waffly, but might be useful to someone!