The 6008 is not a suitable card for you to use as the analog input rate is too slow for your application. It can only do 10KS/s aggregate (total for all channels). This means that using 4 AI channels, you could only run at a rate of 10K/4 = 2.5KS/s. The 6009 is suitable, but devchander has a good point that it is still not the best for your application. For strain and acceleration measurements, I would suggest either our SCC series or CompactDAQ which have signal conditioning for these measurements. Please see below for links.