I suggest a quark with xr-e head and AA^2 or your preferred li-ion configuration. EDIT: XR-E, dammit!
The previous versions of quark used xr-e LED, which is a smaller and more intense diode than the new xp-e LED. I really like how the neutral white quark xr-e throws. I doubt you'd find much more compact thrower than that, except possibly the jetbeam (of which I know very little). I haven't tried many of the "super throwers" available out there, but I think it is close to impossible to find something significantly better at this size.
I have neutral white quark AA and AA^2, and I use the last one for the exact purpose you describe. The single AA version is still plenty bright for the use you describe, but the AA^2 has that extra punch and more importantly: Much better runtime. It is still shorter than 15 cm, and quite slim. I'd say the quark gives useful light allowing me to see clearly out to somewhere close to 150 meters, or at least somewhere in the 100-150 meter range. Using a slightly bigger head (such as the jet beam M-III neutral white, which I got a week ago) does not extend this range significantly. I can see things better at 120 meters with the jet beam than with the quark, but I can't really spot things further away with the jetbeam than with the quark. I my opinion, if you need to see clearly things beyond 150 meters (as opposed to not just throw a blob of light to impress your friends) you need either a HID or incan searchlight. A slightly bigger head makes a better thrower, but the increase is real life distance of what you actually can SEE is not really that great.
In my book, the quark xr-e AA^2 offers a close to perfect compromise between size, available brightness (both max, low and intermediate settings), shape (slim and low profile, slips easily into most pockets except jeans pockets), throw and run time for outdoors use. I use the quarks for everything. The side spill is great for close quarter area illumination. The easy "tap-for-more-light, screw tight for max light" interface makes it easy for me to use the appropriate light level for the task at hand. You'll love the super-low (.2 lumens) and low (5 lumens).
The caveat is that you have to "lego" the light yourself with parts from 4sevens.com: Xr-e heads, bodies of your battery configuration, a switch and whatever accessories you care for (lanyard etc). This will cost a few dollars more than buying the regular light in a box. Still not overly expensive. Remember the cpf discount.
Oh, and I really love the neutral tint (5a), particular for outdoors use. I think the new warm whites (hopefully being shipped tomorrow) will be great to, but untested I won't speak for them. And the warm whites will be xp-g LED, which throws far less than the old xr-e version. I don't own any xp-g quarks, so I won't speak neither bad nor good about them- for all I know they would be good for your purpose as well. But I can testify for the neutral white xr-e
EDIT II: I did a very unscientific test of quark AA neutral white on li-ion 14500 versus jetbeam M-III neutral white. The quark seemed weaker than I remember my AA^2 to be (gifted). That could either be due to bad contact (it is really gritty), the battery not (yet) being delivering the full capacity or just an illusion on my behalf. Either way, I found two distinct targets that were "appropriate" for my test and I could just barely see at 150 meter with the jetbeam, 125 meter with the quark. The quark and the jetbeam has the same led (xr-e neutral white), the only differences is that the jetbeam has a bigger reflector and is possibly being driven harder.
EDIT III: The quark turbo has about 5% more throw than the "old" xr-e version, according to 4sevens. I don't know what that means in terms of how far you can see, but I doubt it makes for a really mind blowing real world difference.