I have tested and owned many models of different brand( Surefire/fenix/jetbeam/streamlight/Olight) in different condition from standard use to harsh one. And in final i always stick with Olight.
For a full size high performance i use an
Oligh M3X
700 lumen XM-l LED
http://www.olightworld.com/product_show.asp?id=233
For a smaller and more light setup i use a olight M20S xp-g R5 and you can change the LED for an Xm-l one.
340 lumen
Olight M20-X M21-X XM-L Flashlight Review - YouTube
To illustrate the toughness:
Olight M20 Warrior brutal test - YouTube
And all this doesn't cost a leg and an arm(like surefire)
+- 90-99$ for the M20 and 140$ for my all time favourite M3X at 140-150$