I own both a Brompton and a Citizen Miami,so I have something at both ends of the price spectrum.The citizen is a great machine for the price and have put many miles on it the three years I have had it.If the extra weight is a problem you can lighten it by removing the fenders and the rear rack by almost three lbs.You can buy plastic fenders if you need them and pick up a super light weight rack that attaches to the seat post for about $25.
The brompton speaks for it'self but I wouldn't give up on the citizen and have no plans on getting rid of it.