MBurke: I have the (discontinued) BT10. I use it for night gravel riding and night single track rides. I got that light because I use rechargeable AA batteries but never needed the second set in even my longest (4+ hour) rides. The light you're talking about is currently on sale and has it's own battery pack. It's obviously going to be brighter and the "dual beam" is pretty nice for seeing down the path and lighting up pot holes. it sure looks like a super nice deal to me.