You guys at sparkfun already carries the IDG300, so why not invest in a batch of IDG1000 tuned to 150deg/sec, to work with the ADXRS150 in a single board triple axis gyro? I talked to the manufacturer a while back, but they only sell them in quantities, so they are off boundry to hobbyists.
Perhaps they would even work with your existing IDG300 boards?
Regards,
Kjetil