I'm using a baby bjorn baby carrier and a maclaren stroller.
I bought my bjorn carrier at Mothercare with a 20% discount. They were having an ongoing promo that time for bjorn brand stuff. They usually have this promo from time to time so you can look out for it. How much it costs would depends on the model that you buy. I bought the bjorn air. Was retailing at $198 and I bought at $158 after discount. I also saw that model at Baby Hyperstore but they only give a 10% discount.
For maclaren, I bought the Techno XT from Baby Hyperstore. I can't remember exactly how much I bought it for but it was around $400 plus. If you buy the older models of Techno XT, it's cheaper.
As for Quinny, I dont't see that they have strollers that allow the baby to lie flat when newborn so you need to get a carseat that fits into their strollers for the first few months for your newborn to use it. Also, I find Quinny series of strollers heavy. Though I think Quinny Zapp is supposed to be their most lightweight model.