I am very interested in a commuter bike to take to work and shove in the corner of the office. I'd like it to be very reliable/durable, easy to fold (not interested in a bike that comes apart, ie Ritchey), reasonably light, able to be ridden while well dressed, designed for more than just pedaling a mile or two and therefore fast, obtainable in the U.S., and with cost of no more than $1500. I have ridden a Dahon Caio and found it to be a comfortable bike in the right vein of what I want, but unconvincing for a long lasting reliable bike. I am pretty familiar with the Dahon line at this point. Am I wrong in thinking a Dahon won't hold up? If you are adamant about a particular Dahon model you have lots of experience with and would like to recommend, please do. Otherwise I am mostly interested in exploring what else is out there.