Maybe think about buying a second hand folder with a great frame. Take the $ saved and throw a boatload of super lite dura ace on it, some super lite new wheels, etc. You can also buy used BF PR; if interested I can provide you with the best forum source. BF also sells just frames so you could build up something on a sweet frame with no hinge that makes you happy. And Bikes Direct has a minivelo you can cannibalize the frame from for a rebuild. There's a big thread here on it. Of course, if you can't or don't like to wrench, none of this is really cost-effective.