I can see the goodness behind a CD burner... the guy is busy... while he is running around doing everything else, he wants to pop a disk in, let it run, pop it out at the end. The problem is that it's a one shot deal... and what happens if it runs over 80 minutes?
I would suggest an R4 (used stock one is fine) with 2 channels of mics, and 2 channels of SBD, and patch a CD burner out of that via SPDIF (or analog if necessary). Record into both. 90% of the time he will use the CD that comes out and be happy with it. If something happens to the CD (runs over time, bad disk) then copy the files off the R4 to a computer, or even just hit "Play" on the R4 and run it into the CD burner again which is already hooked up. If someone wants to take the raw files out of the R4 and mix them more carefully, they can. Get in the habit of formatting the drive on the R4 once a week to make sure it doesn't fill up. Other recorders besides an R4 would work, but I think a hard drive that will hold a week's worth of stuff is easier than flash memory (also avoids "Oh Crap! I left the flash card at home!").
Put the mics overhead, mounted to the lightbar, that way no one spills beer on them. Run the mics through the snake, and on the SBD end of the snake, run them right into the R4, and not the SBD. 2 reasons for this...
- if they are condensers they need phantom power, and since probably nothing else on the SBD is using phantom power, they won't have phantom power turned on.
- if the mics go into the board, the sound guy will accidentally mess with the levels or something. Run them into the R4 and forget about it.
If the mics are fairly close to the stage/stacks the time delay is low (10' is OK), and mixing on the fly is not a big problem. Ideally, though since you know where the mics are permanently mounted X distance from there should be some little black delay box you can add in the SBD patch line to add an equal delay to that chain, then the on the fly mix is timed correctly.
Mics don't need to be exotic... that debate could go on and on. One thing I wouldn't recommend is bright mics, or ones with a big "presence hump" because mics mounted overhead will already tend to get more than their fair share of cymbals, and mics with a big presence hump would tend to overemphasize that. Something with a good bass response would be good, especially if the sound guys don't run the bass guitar through the SBD. If these mics don't pick it up, it won't get in the recording.