I had my Midas Venice 320 modified to have the direct outs be post-gain, post insert, pre-fader, pre-EQ - they were originally post fader. Once I have my gain structure for the live mix, I connect the direct outs to an Alesis HD24. The faders on the mixing board only affect the live mix, not the post-gain direct out levels that go to the Alesis. The post insert allows me to have gentle compression and gaiting - from my 4 dbx 166xls'(kick,snare,rack,tom,hat,bass) recorded.
I can literally track the performance and remix later. Anything that doesn't quite work, - lead fills, back-up vocals - missed parts - can later be tracked to the rough mix and blended back in. The remixing in the box, also allows me use of any plug-in I have. If you have a band that plays tight, it's an incredible tool to be able to capture a live performance. Sometimes, I'll put up my Zoom H4n at the FOH to capture the room, and blend that in with the tracking.