5 years ago I bought a NR self contained unit. It cost a bit less than half my prior system, weighed was less than half and had 1/3 the parts needed to ride (old one was light, cable, and battery vs. new self contained unit). Ohh and it was double the lumens. For all the talk about increasing bike prices, light prices seem to be the opposite and I think the products have advanced even more.
I am due for a new light again and I have been a loyal NR customer, I hope they come out with new stuff and do some crazy sales on the current stuff.