I have a Princeton Tec Corona that I use for running a lot. I am not sure how the Corona on the 3 led setting compares to the Aurora's 3 leds, but I find that it is adequate for even surfaces. It doesn't seem like quite enough on trails though and I usually use the 8 led setting. I think the battery pack on the back is good because the light up front doesn't jostle around and it stays pointed at the correct angle. The AA batteries worried me before I tested it out, but I have never thought that they too heavy. I wouldn't hesitate to get one like the Apex with 4 AA batteries, but it is hard to take the plunge on that one because I couldn't really tell if the spill is enough with the 3 watt bulb at the store. I would be interested if anyone had an opinion on this. I seem to like the wide flood of the Corona.