Impact wrench suggestions?

I just bought this kit and so far I love it. The radio works great and even on AM which most radios don't. Was going Milwalki but this has a lifetime warranty. I wrench for a living so IT WILL FAIL EVENTUALLY. http://www.homedepot.com/p/RIDGID-1...r-Combo-Kit-3-Tool-with-Radio-R9601/203810442
If you want more power I would go air. Never go wrong with an IR 231