You could also go with a 80s japanese mixte frame bicycle. I have a chromoly early 80s Nishiki Olympic 12 speed mixte. I think it was 25 pounds or so before I put a really heavy rack and rubber pedals on it. I think my bike looks pretty classy, but it is lacking IGH. THis is not a deal breaker though in my opinion-- I managed to get a hebie chain guard over the double front chain rings.