Jesse,
In that case, there is the PCI-6025E which also has the extended DIO lines. It has a 500 kHz bandwidth which would give you a lot more room perhaps. If not, you could always add a
PC-DIO-24 card in combination with a 6070E. The PC-DIO-24 is pretty cheap and would give you the same functionality as the extended DIO lines of the AT-MIO-16DE-10 or the 6025E. There's even a 96 line version too if you think you'll need more DIO than that.
-Russell
