I owned a Dahon Hammerhead for a couple of years, fore-runner of the Smooch Hund, and using the same frame. It was stiff and light, and ultimately unforgiving - so much so that I rarely rode it. A thing of beauty, though, and speedy.

If I had to do it again, I'd buy the Mercier Nano; it appears forgiving, standard parts, upgrade-able, endlessly fiddle-able, and good looking. It's also a lot cheaper. There's an entire thread on them someplace.

While on the topic it's easy to be seduced by fat tyres and IGH's but they add mass and friction, and that, for some, is apostasy if the rider is going on the crusade of 'fast and light'.

Mercier Nano's not available in the UK, so if anyone wants to bring me one over, do get in touch.