you need to go to a few local pram shops and ask them, they all fave there fave (ie which one has the better mark up) but ive played with a few, iCandy, Teutiona, phil and teds and britax. they are all good. but i think iCandy is the more versitile of them.
i got mine 2nd hand off ebay for £175 for chassis, seat and carry cot.
there are some relaly good 2nd hand ones out there.