Well, I dunno about "best/brightest", but I can tell you my experience.
I am a cop, and have been "spoiled" by high-output flashlights since I bought a Streamlight SL-20 in 1979 and a Laser Products (now SureFire) 6P in the late 1980s. I have never been impressed with any sort of stock MagLite; to include their rechargeable "police" lights.
My mother, bless her heart, purchased two 2D MagLites at WallyWorld and gave one to me in preparation for the Event That Wasn't... Y2K. I thanked her, threw it in the back of the closet when I got home, and promptly forgot about it.
I found that thing, still new in the package, last year. I was going to use it as an Xmas gift for someone, then read about the EverLed drop-in LED bulb here. I felt a bit foolish spending more than twice what the whole flashlight costs for a bulb; but its only money, right?
Let me tell you; the EverLed makes an entirely different animal out of the 2D MagLite. Its every bit as much of an improvement as the Opa-Lec Newbeam is for the AA MiniMag. Aside from a much more pleasing and more useful beam, the LED will run 24 hours straight on two alkaline D cells, and still have some dim light left. It makes the perfect "storm light", since MagLites are, if nothing else, as durable as you can get.
Anyway, I keep it by the bed, as a supplement to the 6P-with-KL3 that serves as my "house light". My wife has one of those StreamLight 3-C cell incan/LED hybrids on her side of the bed. Between those three, we have many hours of usable light for power outages, etc.
I'm in plainclothes now, and use a SureFire A2 professionally. But if I went back into uniform, I'd throw that 2D Mag/EverLed light in the unit to use for poking around wreck scenes, etc. The problem with high intensity lights for police work is two-fold: the batteries, whether rechargeable or lithium, don't last very long. And the light is usually TOO bright for non-confrontational applications.
The 2D Mag/EverLed combo is plenty bright enough for "normal" use, and lasts incredibly long on two batteries that are available anywhere. While it would certainly not be my choice for those "can only take one" scenarios, this combo is a solid, VERY useful general purpose light.
Your mileage, of course, may vary...