Great article! The author is my colleague and one of the primary visionaries for this entire product family. I suspect that 18g is going to be a good place to start. The ADXL326 would be a good place to start. Make sure that you buffer the signal into your ADC if it presents any challenges for the 32-kohm source impedance. How fast can you sample the axes? I would suggest starting at 5kSPS (at least) and could make a case for higher if it was not a problem in your system. How do you plan to analyze and leverage the data?
Best,
NevadaMark