Most people in this thread seem to be using fancier dynamos. I've got a shimano one, but haven't wired it up yet so can't tell you whether its actually any good! I think it's basically gonna take more of your watts to output the same power, if you're happy with that, fire away!
Is there any reason not to go for this wheel: http://www.sjscycles.co.uk/700c-front-wheel-shimano-alfine-wh-s501-v-24h-rim-with-shimano-dynohub-6v-05a-3w-in-black-prod37210/
Seems absurdly cheap, the hub itself appears to cost that much normally.
Then I'd only need the lights, right, or are there other things needed - wires etc?