Well, one of my mates uses a MTE P7 and is very happy with it.

I've got an Aurora which personally I prefer.

Check my signature for a review of it.

If a single 18650 torch with 2 modes would suit you than this might be a good place to start:



http://www.dealextreme.com/details.dx/sku.15691

The best place to start is how many modes do you want ?

What runtime do you want ?