I agree that once you get a hub dynamo, you will ask yourself why you didn't sooner BUT it's not much extra trouble and expense if you get the bottle dynamo first. Bottle dynamos are easy to put on and take off. You'll have to rewire when you change dynamos, though.

I got my bottle dynamos on ebay, cheap.

Check out xxcycle.com in France, as they seem to have more B&M models than anyone. Even if you don't buy from them, you get time to think about which features you need, e.g. light sensor, standlight.

One of my bikes has a Sanyo hub. It's the cheapest you can get, yet it works flawlessly. Another has a Velo-Orange hub which I think is made by SunXCD. It has a manual clutch which lets you remove all drag, a feature no other hub has, as far as I know. But I never disengage it, because I figure it's worth putting in the extra (imperceptible) effort to power my lights in the day.

The choice of tail light is not very important. Just choose one. And supplement it with a battery powered blinky. And supplement it with other things such as reflective material, wheel lights, etc.