Batteries are being improved all the time, and there is no doubt that we will see better batteries in the future.
BUT, I'm quite willing to let new types of batteries be around for a while, and develop a track record before I jump on the band wagon. AW IMR's have been around for a while now, and while several have vented .. none have gone BOOM. I kinda like that.
This vid is a
MUST SEE IMO
http://www.youtube.com/watch?v=SMy2_qNO2Y0
What the vid doesn't show is that what took 30 minutes to do while charging, can happen in a mili second when discharging. So learn all you can about battery safety.
That big ole 18650 battery that we all like so well can be a 1/4 stick of dynamite if misused.