Re: My parents are asking e what I want for Christ
Since I don't know the purpose you will put this lite to, I will assume it's for general use not specific to any job or one task.
Hell, even if it was more specific, I think the E2e is the best place to start. Some start with the G2, which is a more affordable Surefire, but, looking at your list, you are ready to plunge in.
The E2e is small, brite and flexible. You can add the KL1 or KL4 later as AuroraLite sez, or an E1e body, or the MN02 lamp for longer runtime, or one of Doug's extenders or his E2C.
So, that takes care of half your list -- you can get an E1e or KL1 later; the E2D, well that's a style choice for you, I'm against it cuz it'll be easier to mix and match HA natural rather than black, and you won't be hassled at the airport; the E2O has the longer clip, but you can buy one from SF if you really want one.
When you get to the LEDs, the L1 isn't impressively bright enough, the L4 doesn't offer two stages, which is a big plus that the L2 does offer. However, if you were to have only one Surefire, and not build on the E2e, you could consider the A2. Then you get both worlds, LEDs for low light and battery saving, or incan for throw.
In the end, I still recommend the E2e, with the L2 and A2 as backup choices.
Hey AuroraLite, welcome to CPF and why dontcha stay awhile!
daloosh