snafu, id love to try each of them in person, but the only place folders are available in my area is over the net. and i'm sorry to say i can't afford to buy all three just to see which one fits / rides better.
the trinxx claims max rider weight of 250, i cant find anything on max rider weight for the citta and the dahon is 230.
i may go with the trinxx for that one reason alone.