What about a Wabi? Don't think you could convert it to a geared bike but it may meet all the other requirements. If interested see Wabi Cycles. There are three flavors to choose from and you can select gearing, and various component sizes to fit you. You can get a custom paint job if you wnat to spend the money. Complete bike prices are $700-$1100. Or you can buy a frame set and build up what you want.