Several options on dyno hubs. I use them on any bike that I am going to ride regularly. I currently own 3 old Sturmey Archers, one modern Sturmey Archer, 2 Shimano's and one Sanyo. The
Sanyo was the cheapest of the newer hubs at ~$40usd and is QR. I don't have it laced in a wheel...yet. All of the others are in daily use and work just fine. There are a couple of inexpensive (relatively speaking)
LED head lights that will do fine for general riding. I use the higher end B&M ones; IQ Fly and Cyo primarily. I have never had a head light stolen off of any of my bikes, however I don't live in NYC.
FWIW all of the modern hubs are rated at 6v 3w or 6v 2.4w if you happen to get a German spec one. The difference in price is usually due to the quality of the bearings and hub portion.
Aaron