That Ituo looks like a great light! I have been using a $30 XinTD C8 and I am happy with it. Except the runtime is about 1.5 hours. I can't stand external battery packs as there is no room on smaller frames. The two batteries and 1000 lumens will probably give better runtime.

I have a Cygolite Metro 550 to use for daylight flashing for visibility while commuting. I'm happy with how bright it is.