I really don't understand the exact purpose for the light. What do you realistically want to do with it?
Using a tiny flashlight for self-defense is idiocy, pure and simple. Unless it is pitch dark and you can blast hundreds and hundreds of lumens right in their face, not much will be accomplished.
Other than they will know where to shoot/stab/swing...
Assault bezels are worthless for the same reason. Youd want either a huge flashlight to use as a club, or a baseball bat or gun. You don't attack with the 2xAA light.
Even if using a flashlight did work and blinded the foe, you are almost guaranteed to be on the wrong mode or whatever. So the bad guy will be the recipient of your 'moonlight mode' (0.2 lumens). ;-)
If you are on the street, fumbling around to pull out a tiny flashlight is an even worse idea. That just gives you a false sense of security.
There are plenty of similar threads about the concept of flashlight defense, but please reconsider this use of your light.
So, apart from self defense, what do you want the light for? Is there a reason you want particularly high throw?
It is a good idea to get quality products, but without a better understanding of your needs, it seems a bit much to spend hundreds of dollars on a flashlight.
I personally have an itp A1 on my keychain. With 3 lumen, 30, and 200+ lumen modes, it covers the bases nicely and fits into my pocket easily with its 2.3 inch by 0.8 inch dimensions. It costs a whopping 32 bucks for the stainless steel version.(minus discount). But I don't need much throw either.
If you really wanna spend a lot of cash, consider one of the special keychain lights out there. Look up the "Drake" and "Draco", and under Reviews forum, check the sticky under Small Light Roundup. You can get some really cool titanium light that is pretty bright and uses CR2 batteries or the like for maximum compactness. Some of those small ones are works of art!