You should try to figure out how to use both Exclusive Mode and Event Style, if your DAC allows it. Exclusive Mode bypasses the Windows Mixer which can be critical to good sound. Event Style allows the DAC to control the timing of the data going from the PC to the DAC. PCs are not good real time computers, so should not be used to control the audio timing. The DAC has a master clock that controls the timing to a much higher degree of precision that the PC can, thus decreasing what is know as "jitter" or timing inconsistences. Event Style provided a big advance in computer audio when it was introduced by Gordon Rankin of Wavelength Audio. Bit Perfect Audio insures that the bits that the DAC gets are the same as are in the file. Event Style insures that the data getting to the DAC is at the exact sample rate, e.g. 44.1K samples per second, not at, e.g., 44.101 or 44.098.
So, I would not settle for just Exclusive Mode. Do some online research and talk to the DAC manufacturer. You should be able to do both, assuming the DAC supports Event Style.
UPDATE: It looks like this device is a switch/mixer rather than a DAC. If so, it may not support Event Style in the way a typical DAC does.