Hello,
The PCI-4472 would be best suited for vibration measurments. It has 24-bit resolution, Simultaneous Sampling, Hardware Time-to-Frequency Domain Conversion, 110 dB Dynamic Range, and hardware filtering. See the following Link for more details on the 4472: http://sine.ni.com/apps/we/nioc.vp?cid=10572〈=US
The 6289 was not built with vibration analysis in mind, the the dynamic range is not spec'd.
Let me know if you have any further questions.
Sean C.