Dave,
In my mind, top tier folding bikes based on ride quality are Moulton (long wheelbase, spaceframe, suspension), Bike Fridays (possible custom-fit for your body, air ride and whatever specified components you desire) and Xootr Swift (custom components possible, very very stiff frame). If you are in love with the BF's ride, do NOT, repeat DO NOT buy a Dahon or you will be dissatisfied.
Your choice would be to save and buy a new or used BF, Moulton (harder to come by) or a Swift. If the smallest fold is not a principal requirement, I think the Swift represents the best value as it uses standard components and you can pretty much make the Swift into whatever you want it to be. If you WANT a BF however, there is nothing wrong in waiting until you can satiate the desire
