The MiNewt 600 cordless is popular. It's $108 at Amazon. The mounting options for torches on bars is not a problem; I've tries several and the surprisingly, the $2 U shaped piece of rubber is the best mount. I have a bar extender. Poke around the other threads and the under $50 thread. If you can find a solid mount, the Shiningbeam S-Mini is an excellent light. And it uses off the shelf 18650 batteries. I've never thought about mounting a torch lower. It might be interesting to try. I am an advocate of two light sources: one on the bars, one on the helmet.

YMMV