USB R Series devices offer a number of I/O capability upgrades over previous generations of R Series devices for PXI, PCI, and PCI Express. On the analog I/O side, these upgrades include faster analog input rates, user-selectable analog input ranges, and native fixed-point data representation. The upgrades to digital I/O include user-selectable logic levels and higher performance I/O that allows for faster speeds.
Now, I suppose you're using most of the functionnality of this type of RIO/DAQ board like Analog I/O, DIO and counters. If not some hardware using PXI with customizable front-end can help you to fit your need like the FlexRIO.