Not sure anybody looks at the lumen/weight but it seems a bit deceiving. Hard to compare when the external battery can be of different capacity ... If anything the lumen/weight without battery would seem more interesting for units with external battery.
Today I just picked me up a new Light & Motion Urban 800 with the fast charge. It's an excellent light. And it's new for 2015 line from L&M. Here's the link to check it out. Priced pretty decent as well.