I really like(d) my E2DL but I did find it a pain to carry and use because of the tailcap. I do really like the brightness though.
I really can't comment on the new L4 although I'd love to try one just to see the beam in person. The downside of the L4 is there is no low level option, your always running full blast.
I voted for the L1. It's a light I got recently and can't put it down. Love the UI and the size is about perfect for my hand(s).
Although you didn't list it as an option I'm really impressed with the E2L. 60+ lumens on high for almost 6 hours and a 3 lumen low. Your batteries will last a long time and 60 lumens is plenty for most tasks. I also have the older single level E2L that runs 9 hours @ 45 lumens. Very nice as well.
I have to agree with Al that I too also like the UI of the L1 better than the UI of the E2DL and the E2L. There is another option "coming soon"
The LX2. 120 lumens high, 15 lumens low, same UI as the L1.
It's a hard call. Just realize that the L1 is smaller that the E2DL and E2L, even though it's bigger that the E1B: