A SureFire 6PL with a Malkoff M61 drop-in. The M61 replaces the P60L that comes stock. If you plan to buy a replacement drop-in, then you can buy the less expensive incandescent SF 6P. The 6P and 6PL have been discontinued, so I don't know about availability.
I also have a flashlight that looks a lot like the Surefire 6P and is much less expensive. Bought a Solarforce L2P host and put a Thrunite P60 style drop-in lamp. So for just a bit more than $50, I have a flashlight with HAIII finish, almost 400 lumens, and excellent tint.
Even though the Solarforce has been 100% reliable so far, the SF w/M61 will always be my bedside light. It cost significantly more, but Surefire and Malkoff have well-earned reputations for quality and reliability. Some will argue SureFire is overpriced, but I personally disagree. There is more to any product than its advertised specs.
However, that’s not to say there aren’t many well made flashlights coming out of China. Fenix is by far the most well known and can be found in some retail stores. The majority of quality "made in China" flashlights are only available through a number of online retailers. JETBeam and EagleTac are 2 that I like, but there are quite a few others making good stuff.
But if you want the best go with SureFire or HDS Systems. Both American made and very high quality. Surefire will not have the latest emitter or offer the highest output per dollar, but they work when you need it to work.