Well I looked into this quite a bit and decided to buy from Ebay.
Bebe Confort stuff seems well made but heavy – goes for nothing on Ebay so don't buy new but could get a bargain 2nd hand.
Quinny – very popular so lots on Ebay and can get a good deal price but no bargains.
Bugaboo – very popular and hold value well; if buying new I'd go for one of these.
I ended up with a Bebe Confort car set which I got for £1 on Ebay – v good condition – mainly bought it as was given a Loola which looks good, folds up well but is very heavy.
I also bought a Quinny Freestyle in good condition for offroad which came with car seat and cot. I then bought a Quinny Zapp which folds up well and is light and works with the car seat.
I probably spent £150 on that little lot and all in good order – check them out on collection – esp car seats which are often made with polystyrene so don't want that damaged.