Why do I want 15 gears, 3 (or 1) would do.
15 gears? man that's so 80s! :-)
These days you can buy some very nice cheapish 7 speed hub gears (or a 14 speed Rohloff item for £800!). These are ideal for most (city) riders.
If you have a regular route and the bike will be used for that (i.e. commuting) then you could easily either drop two of the front rings and the front derraileur (you might have to faff around with the size of the remaining ring for optimum ratios) or you could fit a hub gear with a single front ring.
I built a nice bike for my mate who lives in Hackney and works in the City, it had a single front ring and a close ratio rear block, it was absolutely superb on his regular route, but would have been a nightmare on our (then) regular cycle touring holidays. Lots of ratios are great for a wide variety of conditions or when you are swapping between carrying loads and riding unencumbered.
You're right, the Dutch have some lovely utility bikes to choose from, here it's all fashion and technology.
However, despite all this luddite talk, I have a beautiful 1950s Raleigh here, rod brakes, Brooks saddle, dynamo, etc. It's a pain the arse around town, it weighs a ton, the geometry is too lazy and the brakes are shite. Looks a million dollars, but I only use it to go to the shops. Talking of which, does anyone have an old (50s, 60s) saddlebag that they no longer need? I had a nice one fitted but it rotted away.
GC