I looks like Uciflylow has chosen a light but I'll chime in for future reference. I settled on a Niterider Digital Evolution recently after shopping for a while and owning a Nitehawk and first generation Digital Headtrip. I checked out the Light and Motion ARC and was very impressed, but couldn't afford it. I'm not sure how Mike determined the Trail Rat to be brighter than the Evolution, but this simply isn't true. Niterider has some serious quality control problems, which I was aware of, and am hoping they have resolved, because the lights performance is fantastic. The HID systems in general have had some problems as well, but - it would appear - less than Niterider's initial digital offerings. My old Nighthawk still runs like a charm - I just wanted something lighter and brighter.