After destroying various 'Active' smartphones I purchased a Cat S60. I used it for two years, long enough to rip all the carbon fiber off the back. I was happy enough with it to purchase the new model S61.
Most of the things I was unhappy with on the S60 have been improved on the S61. If you have no use for the FLIR camera and other features the S41 is similar and cheaper. I've used it as a company phone a few times with no issues.