I have just bought my first surefire product, but have not received it yet, so my knowledge of these products is second hand. Surefire products are built like tanks, are high intensity and great for short periods of time, due to battery usage. I understand they are coming out with an LED soon. The Inova X-5 is a well-built LED flashlight. It is one of my EDC flashlights. I would suggest you go to http://www.candlepowerforums.com/cgi-bin/ultimatebb.cgi for a complete comparison of flashlights. Pete