From what I understand, the 701 has "a" burr-brown dac as well.. Not sure if it's at the level of the 9255 dual 24bit/96khz processing though, but I imagine it's gotta be pretty decent.
If you think about it, the H701 is not only a DAC, processor, EQ and crossover.. but it's also a preamp.. From what I've read about what makes the 9255 so great, it's in good power supply as well.. Supplying a good 8guage line to the DC/DC converter with the toroidial power chokes is probably one reason that unit is such a beast, ontop of the excellent processing. If I were installing a 701, I'd use a nice thick power line and ground, personally.