Enjoy your E2DL - Its an awesome light!
The L1 vs. E1B is a tough choice but if you only want one, I would give you the same advice as I would with your portfolio - DIVERSIFY and go for the L series as the E1B and E2DL arent too far off from eachother...
1) The High: Since you already have your uber thrower (the E2DL), honestly the E1Bs 80 lumens are not too far off so you might want to give the 65 lumens of the L1 a +.
2) The Low: The E1B and E2DL have the same 5 lumen low - the L1 has a very very useful 10 lumen low that honestly works for 75% of my tasks and is noticeably brighter than the Es.
3) Fit and Finish: the E1B and E2DL have the same sort of "look" when compared to the L1, so if you want to diersify, another + for the L1. I personally love the HA and "lines" of the L1 - its just a gorgeous and well proportioned piece of engineering.
However, if you do get the E1B, I suggest swapping the tailcaps of your E2DL and E1B. The smooth E1B cap on my E2DL makes it sooooo much more pocketable and really has a nice feel to it. The E2DL cap on my E1B gives it a lot of extra grip and is much easier for me to hold - plus it just looks wonderful.
Lastly, regardless of your decision, pick up the 04 diffuser as it really changes the functionality of the TIR lights and it can be interchanged between the E2DL, E1B and L1 - well worth the $12!
Of course this decision is much easier said than done as I wound up getting both
And honestly after having these 3 Surefires and a C2 as a drop in host, I think I can safely say that I won't need to buy another Surefire until the UA/UB2s and Saint come out (yeah right)...